DETAILED DESIGNS OF PRACTICAL PERPETUAL CALENDARS

Transcription

1 DETAILED DESIGNS OF PRACTICAL PERPETUAL CALENDARS A supplement to the book PRACTICAL PERPETUAL CALENDARS INNOVATIVE, CONVENIENT AND GREEN JAMES R. SALTVOLD Copyright 2018 James R. Saltvold Revision 1 All rights reserved. No part of this book may be used or reproduced by any means, graphic, electronic, or mechanical, including photocopying, recording, taping or by any information storage retrieval system without the written permission of the author except in the case of brief quotations embodied in critical articles and reviews. 1

2 CONTENTS Page Copyright Note 3 Revision history 3 1. Introduction 4 2. Wall calendar 6 3. Clock with a calendar below it 7 4. Pocket calendar 8 5. Full year calendar 9 6. Seven-column desk calendar Thirteen-column desk calendar Photo and key holders Fixed window style multisheet perpetual calendar with a single year table Ornate hybrid wall calendar Perpetual wall calendars that can be written on 12 A new reference 13 APPENDIX: Tables for Calendars 14 Introduction 14 Tables for single-sheet perpetual calendars with dual sliders 14 Tables for single-sheet perpetual calendars with single slider 18 Tables for single-sheet perpetual calendars with single slider with side year tables 19 Tables for single-slider vertical calendar 21 Variations of the single-sheet perpetual calendar 22 Tables for multisheet and full year perpetual calendars 23 Variations of multisheet perpetual calendar 27 FIGURES See Table 1-2 in 1.0 Introduction for a list (List is on page 5 and Figures start on page 28.) 2

3 Copyright note Although this document is protected by copyright, my understanding is that a copyright does not cover concepts, so anyone who uses ideas they discover in this document has no obligation to me. From my review of a number of patents for perpetual calendars, I have concluded that some of the ideas in this document would have been patentable if I had chosen to disclose them by way of patents rather than by way of this document and my book, Practical Perpetual Calendars Innovative, Convenient and Green. Therefore, readers who use the new ideas presented in this document or my book to manufacture calendars are effectively gaining access to patents without being required to pay royalties. Since this could be of considerable economic benefit, I encourage manufacturers to send me a very modest gratuity of CAN$0.02 per calendar for the first 100,000 produced between now and December 31, 2027, in lieu of a royalty. I also encourage readers who like this article, but have not purchased my book to send me a modest gratuity of say CAN$5 or to suggest that their local library add my book to their collection. The table below provides more details of the suggested gratuity. Total number of calendars manufactured Suggested gratuity (may be all of one type or of mixed types) (see paragraph below table on how to pay) 100 or fewer Covered by: 1. Purchasing my book Practical Perpetual Calendars, OR 2. sending me a gratuity of CAN$5, OR 3. suggesting that your local library add my book to their collection More than 100, but fewer than 1,000 CAN$20 1,000 or more, but fewer than 100,000 CAN$0.02 per calendar 100,000 or more CAN$2,000 The suggested gratuity of CAN$0.02 per calendar is based on calendars that sell for $1 or more each. When the price is less, the gratuity can be proportionally less, but the minimum payment should be $10 if more than 100 calendars are produced. The gratuity can be paid to my PayPal account. Go to and click on Send. In the box Their or phone number, enter greencalendars@gmail.com. Next, enter the amount you would like to send, click Continue and click on Goods or services. Revision history Rev /01/09 First posted on website Rev /01/13 General revision to fix minor errors 3

4 1. Introduction This document describes what I consider to be some of the better calendars in my book, Practical Perpetual Calendars Innovative, Convenient and Green. The designs that I have chosen are ones that I consider to have the most potential for success in mass marketing. For some of the designs described in this document, I show more details than are shown in my book. However, as in my book, the emphasis is more on how to use the concepts than on how to replicate my prototypes. In my book, I define four types of perpetual calendars which are: 1. Single-Sheet Perpetual Calendars These calendars display one month at a time and use the same sheet for all of the months. They may have either a single-slider or a dual-slider configuration. 2. Multisheet Perpetual Calendars with a Year Table on Each Sheet These calendars also display one month at a time, but they use more than one sheet for the months. Each sheet has a year table on it. 3. Multisheet Perpetual Calendars with a Single Year Table These calendars also display one month at a time, but they use more than one sheet for the months. There is a single year table that is used by all of the sheets. 4. Full-Year Perpetual Calendars These are calendars that display all of the months of the year on one sheet. Figure 1-1 shows the front cover of my book and Table 1-1 lists the calendars on it along with the types of calendars they are and the reason for choosing the design. Table 1-1 Calendars Shown on the Cover of Practical Perpetual Calendars Calendar Description Type of Calendar Reason for Choosing Wall calendar Type 2 - multisheet perpetual calendar with a year table on each sheet Wall calendars are a large potential market Clock with a calendar below it Type 1 - single-sheet perpetual calendar with dual-slider configuration Typical of something combined with a calendar. Other applications are a calendar below a picture or above hooks for hanging keys. Pocket calendar Type 1 - single-sheet perpetual calendar with single-slider configuration Shows a compact single-sheet single-slider calendar. The same concept can be used to make a desk calendar. Full year calendar for a three- Type 4 - full-year perpetual Shows the full-year calendar, 4

5 Calendar Description Type of Calendar Reason for Choosing ring binder calendar which can be made larger and from various materials for hanging on a wall. 7-Column desk calendar 13-Column desk calendar Type 3 multisheet perpetual calendar with a single year table Type 2 multisheet perpetual calendar with a year table on each sheet Multisheet desk calendars are a large potential market. This one is easy to build. See Figure 9-1 for another Type 3 calendar that is quite different. Multisheet desk calendars are a large potential market. This one has more characteristics in common with conventional desk calendars than the one with 7 columns. These calendars are representative of the four types defined in my book. They, and variations of them, have potential for success in mass marketing. Sections 2 to 7 below describe the above calendars. Sections 8 to 11 describe other designs which I consider to have potential for mass marketing. Table numbers proceeded by A, e.g. Table A4-1, are in the Appendix. Table 1-2 lists all the calendars that are described in this document. Table 1-2 Calendars Described in this Document Figure No. Description/Application Calendar On Book Page Type Cover 1-1 Book cover All Yes to 2-4 Wall calendar 2 Yes 30 to Clock with dual-slider calendar 1 Yes Clock with single-slider calendar 1 No Pocket calendar with moving slider 1 Yes Desk calendar from one 8.5 x 11-inch sheet 1 No Pocket calendar with moving window 1 No and 5-2 Full year calendar 4 Yes 38 & to Column desk calendar 3 Yes 40 to and Column desk calendar with flip-down 2 Yes 44 window Column desk calendar with lift-out 2 No 45 window Column desk calendar with lift-out pad 2 No Single-sheet tent calendar with dual sliders 1 No Key holder with dual slider calendar 1 No Key holder with single slider calendar 1 No Fixed window style multisheet calendar with 3 No 50 5

6 Figure No. Description/Application Calendar On Book Page Type Cover a single year table 10-1 Ornate calendar 1 No Calendar that can be written on 13-columns 2 No Calendar that can be written on vertical slider 2 No Wall calendar Figure 2-1 is the wall calendar on the cover of my book. It is a multisheet perpetual calendar with a year table on each sheet. There is a moving window on each sheet. The 12-sheet design is used to have the same number of sheets as a conventional wall calendar. As shown in Figure 2-1, the calendar sheet is below the picture. This sheet has the applicable day-of-month table from Table A4-1 at the bottom and the applicable year table at the top. The year table for January and February is Table A4-8 and the year table for March to December is Table A4-7. In Table A4-1, the day-of-month tables have 7 rows. The only month that needs the 7 th row is July. The number of rows can be reduced to 6 by writing 24/31 in the left most cell in the 6 th row for July. The calendar shown in Figure 2-1 has this compaction. In Figure 2-1, the space below the name of the month is blank. This space can be used to write on permanent dates. For example, the line 1 Canada Day can be written on the sheet for July. The two boxes on the day-of-month table that have 1 in them can be shaded or otherwise marked to indicate that it is a special day. Birthdays and anniversaries can be similarly indicated. On the sheet for September the line Labour Day first Monday of the month can be written. Figure 2-2 shows a calendar sheet and window for converting an existing wall calendar to a perpetual calendar. The calendar sheet is 8.5 by 11 inches and can be made from paper or light weight cardstock. The window is made from the same material as the calendar sheet. The steps to make the calendar are: 1. Make 12 calendar sheets using the pattern in Figure 2-2. If the existing calendar has a description or a caption for the picture above the calendar sheet, add it to the sheet. 2. Make 12 windows using the pattern in Figure Cut the slits above and below the day-of-month tables. 4. Cut the H slits in the windows. 5. Put a window on each calendar sheet. 6. Using glue or double-sided tape, cover each old calendar sheet with a perpetual calendar sheet. All four edges are glued to the old sheet. I have converted a calendar following the above procedure. For the calendar sheets and windows, I used standard 20 lb. printer paper. Although this paper is a little delicate for a sliding window, it is adequate for a calendar that is only set once a year. I estimate the lifetime of my calendar to be 5 to 10 years. To make a wall calendar from scratch, I suggest using heavier paper, say 65 lb. cardstock. I also suggest the slightly different construction shown in Figure 2-3. With this construction the only 6

7 gluing required is at each end of the day-of-month table. This is easier than having to glue all four edges of an 8.5-inch by 11-inch sheet. Figure 2-4 shows an arrangement where the year table is below the day-of-month table. This is an alternative to the arrangements in Figure 2-1 to Clock with a calendar below it Figure 3-1 is the clock with a calendar on the cover of my book. The calendar is a single-sheet dual-slider type. It has three windows which are: marker window above the year table, monthtable window above the SMTWTFS line, and day-of-month table window below the SMTWTFS line. The month slider on the calendar is from Table 3-1 below, the year table is from Table A3-9b, and day -of-month slider is from Table A3-1. Table 3-1 is a slightly different arrangement of Table A3-8. The most significant difference is that the marker is beside the month table rather than below it. The window for the marker is the same height as the window for the month table. When the slider is in any position other than the far right and next to far right positions, parts of the month table appear in the marker window. These parts are to be ignored. When the arrangement in Table A3-8 is used, no part of the month table is visible is the marker window. The side view in Figure 3-1 suggests parts and construction details. Table 3-2 lists the main parts needed to make the clock with a calendar. Table 3-1 Month Table for Calendar Below Clock in Figure 3-1 L. Yr. Feb. L. Yr. L. Yr. L. Yr. Jan. L. Yr. L. Yr. Feb. L. Yr. L. Yr. L. Yr. Jan. C. Yr. C. Yr. Feb. C. Yr. C. Yr. C. Yr. Jan. C. Yr. C. Yr. Feb. C. Yr. C. Yr. C. Yr. May Aug. Mar. Jun. Sep. Apr. Oct. May Aug. Mar. Jun. Sep. Apr. Nov. Dec. Jul. Nov. Dec. Jul. Table 3-2 Main Parts for a Clock with a Calendar Below It Part Name Face Backing for face Strip at top of backing Description Paper or thin cardstock that has clock and calendar faces printed on it. Dimensions are approximately 8 inches by 11 inches, with an 8 by 8 square for the clock and a 3 by 8 rectangle for the calendar. The calendar face has the year table, a row with SMTWTFS printed on it and space for instructions or some artwork. There are the following windows: one above the year table for the marker, one above the SMTWTFS row to display seven columns of the month table, and one below the SMTWTFS row to display seven columns of the day-of-month table. Hardboard or plywood that is 1/4 inch thick. It has the same windows as the face. Wood strip to bring assembly out from the wall and to provide something to hang the assembly from. Hang from 7

8 Part Name Clock Spacers behind calendar Calendar back Month table slider Day-of-month table slider Description two nails in the wall by putting notches in the strip to slip over the nails. (Since the sliders move, the centre of gravity is not fixed so two hanging points are needed.) Purchase a clock movement kit from Michaels or another craft store. To simplify the graphics for the face, purchase a kit that includes stick-on numbers. Make from 1/4-inch-thick plywood or other material. Design the calendar face so that all three spacers are the same size. Make from 1/8-inch thick hardboard. Alternatively, thick cardstock can be used. Consists of a face made from thin cardstock or paper which is glued to backing made from 1/8-inch thick hardboard. Same construction as month table slider. When the spacers are made from 1/4-inch thick material and the sliders are made from 1/8-inch thick material covered with thin cardstock or paper, the sliders fit loosely between the face and the back. To make them fit more tightly, the ends of their backs can be built up with layers of cardstock or with thin washers. Figure 3-1 shows a white dot on the marker and a black dot in the centre column of the day-of-month slider. These are locations for attaching raised pieces to push the sliders. The preceding discussion, in keeping with my book, is intended to provide some ideas on how to make a clock with a calendar below it, rather than provide a detailed design. The design can be adapted to make a product that has a picture rather than a clock above the calendar or a product that has hooks for keys below the calendar. Figure 3-2 shows the face of a clock with a single-sheet single-slider calendar below it. The slider on the calendar is from Table A3-11 and the year table is from Table A3-9b. This design is slightly easier to make than the design in Figure 3-1 as there is only one slider instead of two and two windows instead of three. With the year table above the SMTWTFS line, this design is not as adaptable as the dual-slider design to making a product that has a picture above the calendar or a product that has hooks for keys below the calendar. 4. Pocket calendar Figure 4-1 is the pocket on the cover of my book, which is a single-sheet single-slider type with a moving slider. The slider is from Table A3-12 and the year table is from Table A3-9b. The pocket calendar is designed to fit into a inch envelope, which is the standard size used to hold credit cards, hotel key cards, business cards and ID cards. Figure 4-1 has a year table that covers the years 2000 to A prototype made from this figure is a little narrower than the envelope, so another two rows of years could be added to extend the coverage to The single-sheet single-slider perpetual calendar is a versatile calendar that can be used in many applications. One is the clock calendar in Figure 3-2, which is mentioned in Section 3. Another 8

9 application with a large potential market is a tent desk calendar. I considered showing a singlesheet single-slider desk calendar on the cover of my book instead of the pocket calendar. However, I wanted to show the two multisheet tent desk calendars and did not want three similar looking calendars. In Figure 4-1, there are two slits on each side of the window so that the ends of the slider are brought up to the front of the calendar. This is done so that the calendar can be glued to the inside cover of a notepad and still have the ends of the slider accessible. In a tent desk calendar, the ends of the slider are behind the front. Figure 4-2 shows the body of a singlesheet single-slider tent desk calendar made from one 8.5 x 11-inch sheet of cardstock. Note that the slider is beside the body of the calendar and that it is rotated 90 degrees counter clockwise. To draw this figure using Excel, draw the slider below the body with it not rotated. Then copy the slider as a picture, paste the picture in a convenient location on the spreadsheet, rotate the picture 90 degrees counter clockwise, and move the picture beside the body. The resulting tent calendar has a face 5.75 inches wide by 3.75 inches high. Figures 5-1a and 5-1b in Practical Perpetual Calendars shows a similar tent calendar with a face 6.5 inches wide by 4.0 inches high. One 8.5 x 11-inch sheet of cardstock is used to make the body and a second sheet is used to make five sliders. Figure 4-3 shows a single-sheet single-slider with a moving-window calendar, which can be used for a pocket calendar or on the inside cover of a notepad. It is an alternative to the calendar in Figure 4-1. For the same overall size of calendar, the moving-window design can have slightly larger font than the moving-slider design. However, both designs have readable font and the choice of which design to use is mainly personal preference. 5. Full year calendar Figure 5-1 is the slider for the full year calendar on the cover of my book and Figure 5-2 is the face. The day-of-month tables on the slider for January and February in a leap year are from Table A4-3 and the remaining day-of-month tables are from Table A4-1. The year table on the face (Table A-13 at the end of these tables) is Table 4-7 rotated 90 degrees counter clockwise. Thus, the top row has the same years as the far-right column in Table 4-7. The second row has the same years as the next to the far-right column, etc. A feature in Figure 5-1 that is different than in other calendars is 7 markers arranged in a staircase rather than a single marker. This enables having the years in the year table in rows rather than in columns, which reduces the height of the year table. Only one of the 7 markers is visible in the window at a time. A single marker could have been used to point to one column of the year table in Table A4-9. With this arrangement the year table would have been 15 rows high compared to 7 rows. (The year table on the face is 9 rows high when the two rows with notes above the table are counted.). The full-year calendar in Figures 5-1 and 5-2 is designed to be made from cardstock and to fit in a three-ring binder. In this design, the ends of the slider are brought up to the face through slits that serve as tracks. The only pieces are the face and the slider. The same tables can be used to make full-year perpetual calendars from rigid materials for mounting on a wall. A simple wall calendar would consist of the following pieces: 1. Face made from thick cardstock. 9

10 2. Slider made 1/8-inch thick hardboard, plywood, plastic or similar material and covered with paper or thin cardstock that has the day-of-month tables printed on it. Thick cardstock without any backing may also be suitable. 3. Lower track made from 3/4-inch thick material with a rabbet cut to make a track. 4. Upper track which is identical to the lower track. 5. Push knob for moving the slider. It is mounted below the 29 on the January common year day-of-month table. If two knobs are needed, a second knob can be mounted below the 29 on the October day-of-month table. Thick cardstock is used for the face to have a material that is easy to print on and cut out windows. The face holds the tracks apart. If cardstock is not rigid enough, the face can be reinforced with a thin strip glued to each end. These strips would also add some decoration to the face. The above list and all discussions of construction details in this paper are intended to show one way of making a particular calendar. How a shop makes a calendar is dependent on the skills and equipment that the shop has for working with various material, and the effort and expense that the shop wants to invest. 6. Seven-column desk calendar Figures 6-1 to 6-3 show the parts of the 7-column desk calendar on the cover of my book. In Figure 6-1, the month table on the slider is from Table A3-8 and the year table is from Table A3-9b. Each of the day-of-month sheets in Figure 6-3 is for the first of the month falling on a different day of the week. All of the sheets have 31 days and 29, 30 and 31 are ignored as applicable. The two desk calendars on the cover of my book are possible replacements for conventional multisheet desk calendars, which are very popular. Table 6-1 compares the two. Table 6-1 Comparison of 7-Column and 13-Column Multisheet Perpetual Desk Calendars Feature 7-Column Calendar 13-Column Calendar Extra cost for making 50 or less per unit $1 per unit perpetual Size of numbers Same as conventional Approx. 60 percent of conventional Location of year table Hidden under calendar pad On each sheet Size of year table 100 years 60 years Month name Small letters on the slider Large letters on each sheet Need to ignore 29, 30 and Yes No 31? Development/setup effort Minimal Some, but not excessive Note: This table is based on Table 7-3 in Practical Perpetual Calendars The small letters on the slider for the name of the month is a disadvantage of the 7-column multisheet calendar. As stated in the operating notes in Figure 6-2, the procedure for changing to 10

11 the next month on the 7-column calendar is turn to the calendar sheet that has a black mark that lines up with the black mark for the month of interest. This is a more complicated procedure than for the 13-column calendar, where the page is simply turned. When replacing a conventional multisheet desk calendar with a perpetual calendar, the singlesheet desk calendar in Figure 4-2 should be considered as an alternative to a 7-column or a 13- column multisheet calendars. 7. Thirteen-column desk calendar Figures 7-1 and 7-2 show concepts of the 13-column desk calendar on the cover of my book. In Figure 7-1, the year tables are from Table A4-7. For January and February common years, only common years are shown. For January and February leap years, only leap years are shown. The day of month tables are as follows: Table A4-1 for January and February common years and March to December all years, and Table A4-3 for January and February leap years. The sheet for July is shown in the assembled tent calendar. The window is set for The description of the 13-column desk calendar in my book is based on the window being flipped down to turn over the calendar sheet. This is a convenient mode of operation, but I have not found a simple mode of construction that pushes the window against the sheets when the window is in place. For small quantity production where development expenses are desired to be kept low, a lift-out window is an alternative to a flip-down window. Figure 7-3 shows the concept. Figure 7-3 shows the lift-out-pad perpetual desk calendar, which is also a 13-column desk calendar. In this calendar, the pad is lifted out to change the month instead of flipping down or lifting out a window. The sheets are longer than the sheets in Figures 7-1 and 7-2 so that a picture can be on the left end. 8. Photo and key holders Figure 8-1 shows a single-sheet perpetual tent calendar with dual sliders. It is a simple cardstock calendar that is designed to hold a photo. The photo covers the year table, which is Table A3-9a. The month slider, which is the upper slider, is from Table A3-8 and the day-of-month slider is from Table A3-1. Practical Perpetual Calendars illustrates other photo holders that are made from rigid materials. The clock calendars in Figures 3-1 and 3-2 can be modified to be key holders. To do this, replace the clock above the calendar with a row of key hooks below the calendar. Figures 8-2 and 8-3 illustrate two other designs for key holders. Figure 8-2 is a dual-slider design. The year table is from Table A3-9a, the month slider is from Table A3-8, and the day-of-month slider is from Table A3-1. Figure 8-3 is a narrow-face, single-slider calendar with side year tables. The slider is from Table A3-16 and the year table is from Table A

12 9. Fixed window style multisheet perpetual calendar with a single year table Figure 9-1 illustrates the fixed window style multisheet perpetual calendar with a single year table. Like the lift-out-pad perpetual desk calendar in Figure 7-3, a pad is also lifted out to change the month. However, there is one year table beside the window instead of a year table on each sheet. The year table is from Table A4-9. The day-of-month tables for January and February in common years and March to December for both leap years and common years are from Table A4-1. The day-of-month tables for January and February in leap years are from Table A4-3. Figure 9-1 is a 14-sheet design so the 29 th of February is deleted from Table A Ornate hybrid wall calendar Figure 10-1 illustrates an ornate hybrid wall calendar. This calendar uses the year table (Table A3-9b) and the month slider (Table A3-9) from the dual-slider. There is no day-of-month slider. Instead the tiles are arranged manually. 11. Perpetual wall calendars that can be written on A wall calendar can be made that has blank 8.5-inch by 11-inch sheets that are written on and replaced each year. Figure 11-1 shows the concept of a typical month sheet. This calendar has overall dimensions of approximately 18 inches high by 9 inches wide. The top 7 inches has a 13- column perpetual calendar similar to the one in the bottom part of Figure 2-1. The bottom 11 inches is a holder for a sheet of 8.5 by 11-inch paper for writing appointments and other information on. The holder has 0.5 inch strips along the sides and the bottom to hold the paper so that the area available for writing is 7.5 inches by 10.5 inches. Alternatively, the paper can be held in an 11-inch long slit on each side. Each line has enough space to hold the same amount of information as in a 1 3/8-inch square box on a conventional calendar. If more space is needed, information can be written on the back. The perpetual wall calendar in Figure 11-1 has some advantages over a conventional wall calendar, but there are also disadvantages. Table 11-1 compares the two. Table 11-1: Comparison of 13-column perpetual wall calendar with sheets that can be written on to a conventional calendar Feature Perpetual Calendar Conventional Calendar Yearly consumption of 12 sheets of plain 8.5 by 11-6 sheets of 11 by 17-inch 20 lb resources inch 20 lb paper paper printed in colour plus a Cost per year Pictures Approximately $0.25 if new paper is used, zero if recycled paper that has been printed on one side is used One small picture on each month that never changes cover sheet of heavier paper Approximately $ new pictures every year 12

13 Feature Perpetual Calendar Conventional Calendar Need to write dates on calendars Each line has to be numbered by hand and the day of the week should be written on at least one day each week (An alternative to numbering each line by hand is to use sheets that have lines pre-numbered Calendar has date and day of the week preprinted on it Entering appointments that occur next year from 1 to 31.) A new sheet can be added to the holder for the month A calendar for the next year is needed and, if one is not available, the appointment must be entered elsewhere and transferred later As can be seen in the table, the perpetual calendar has the advantages of lower consumption of resources, much lower yearly cost and the ease of entering appointments that occur next year. In many cases, these advantages may not outweigh the considerable disadvantage of having to write the day of the week on the lines by hand. If the lines are not pre-numbered, the day of the month also has to be written by hand. Instead of having the calendar sheet for the month above the sheet that is written on, the calendar sheet can be beside the replaceable sheet. Figure 11-1 can be rearranged to achieve this. A better way may be to modify a line-style monthly wall planner so a vertical slider calendar is beside the sheet that is written on. Figure 11-2 shows the line-style monthly wall planner before modification. The main modifications are to make room for an 8.5 by 11-inch sheet and to design sliders that are unique to each month. Each slider is held in place and guided by two horizontal slits that are similar to the vertical slits in Figure 4-2. Since the sheets that are written on are the same as in the 13-column calendar, the two calendars have the same advantages and disadvantages. In Table 1-2, the vertical slider calendar with sheets that can be written on is classified as a Type 2 calendar, which is a multisheet perpetual calendar with a year table on each sheet. This is the correct classification even though the calendar is made from 12 singlesheet perpetual calendars. A new reference Bear, Magdalen. Days, Months & Years A perpetual calendar for the past, present and future (Norfolk, England: Tarquin Publications, 1989). This book has a good story on the histories of the Gregorian and Julian calendars. The book has full year calendars for common years and leap years starting on the different days of the week, and has tables to determine which calendar to use for the year of interest. 13

14 APPENDIX: Tables for Calendars Introduction All of my perpetual calendars use one or more of the following tables: day-of-month table, year table and month table. The same table may be used in several designs. For this reason, all the tables are grouped together in this Appendix rather placed with each design. The first character for each table number is A to designate Appendix and the following characters are the same as in my book. With this numbering, not all numbers in a sequence are used, as some tables in the book are for explaining a concept and are not used in a calendar design. In some cases, notes have been added to the tables for clarity or other minor changes have been made, so a table with the same numbers after the A may not be exactly the same as the table in the book. Tables for single-sheet perpetual calendars with dual sliders Table A Column Day-of-Month Table Table A3-2 Face of Single-Sheet Perpetual Calendar with Dual-Slider Configuration Window no. 2 for displaying 7 columns of month table Window no. 1 for marker Year table S M T W T F S Window no. 3 for displaying 7 columns of day-of-month table Blank space for a picture or operating instructions 14

15 Table A3-6a Month Table When Leap Years and Common Years Are Separate Leap Yrs. Com. Yrs. Oct. May Feb. Aug. May Aug. Feb. Mar. Nov. Mar. Nov. Jun. Jun. Sep. Dec. Sep. Dec. Apr. Jul. Jan. Apr. Jul. Jan. Oct. Oct. May May Aug. Feb. Aug. Feb. Mar. Nov. Mar. Nov. Jun. Jun. Sep. Dec. Sep. Dec. Apr. Jul. Table A3-7 Full-Century Year Table for Use with the Month-Table Slider in Tables 3-6a Notes: Leap years are in boldface. To add years, imagine that the columns are labeled Sunday to Saturday from left to right. Both leap years and common years are under the column for the day of the week that January 1 falls on. Table A3-8 Month Table When March to December Are the Same for Common and Leap Years L. Yr. Feb. L. Yr. L. Yr. L. Yr. Jan. L. Yr. L. Yr. Feb. L. Yr. L. Yr. L. Yr. Jan. May Aug. Mar. Jun. Sep. Apr. Oct. May Aug. Mar. Jun. Sep. Apr. Nov. Dec. Jul. Nov. Dec. Jul. C. Yr. C. Yr. Feb. C. Yr. C. Yr. C. Yr. Jan. C. Yr. C. Yr. Feb. C. Yr. C. Yr. C. Yr. Notes: 1. Use Table A3-9a, A3-9b or A3-9c for the year table. 2. See Table 3-1 for a slightly different arrangement. 15

16 Table A3-9 Full-Century Year Tables for Use with the Month-Table Slider in Table A3-8 a. Leap years and common years separate b. Leap years and common years together Leap Years (Use top row for Jan. and Feb.) Common Years (Use bottom row for Jan. and Feb.) (See next page for Table A3-9c.) 16

17 Table A3-9 (continued) c. Leap years and common years together and with all years in the correct sequence Note: Leap years are in boldface in all three tables. The following procedure is used to add years not shown to Table A3-9: 1. Imagine that the columns in the tables are labeled Sunday to Saturday from left to right. 2. If the year is a common year, enter the year under the day of the week that January 1 falls on. 3. If the year is a leap year, enter the year under the day of the week after the day of the week that January 1 falls on. 17

18 Tables for single-sheet perpetual calendars with single slider Table A3-11 Single-Slider Calendar with Months of Common Years and Months of Leap Years Separate S M T W T F S Sep. June Mar. Feb. May Oct. Jan. Sep. June Mar. Feb. May Oct. Dec. Nov. Aug. Apr. Dec. Nov. Aug. Leap yr Leap yr Leap yr Leap yr Leap yr Leap yr July Leap yr Leap yr Leap yr Leap yr Leap yr Leap yr Apr. Sep. June Feb. Aug. May Jan. Apr. Sep. June Feb. Aug. May July Dec. Mar. Oct. July Dec. Mar. Com yr Com yr Com yr Nov. Com yr Com yr Com yr Com yr Com yr Com yr Nov. Com yr Com yr Notes: 1. Leap years are in boldface. 2. The slider is in its rightmost position, and all columns are shown. The bold outline is the window. 3. Use this slider with Table A3-7 for the year table. Table A3-12 Single-Slider Calendar with March through December Shared by Common Years and Leap Years S M T W T F S Jan. Leap yr Leap yr Leap yr Feb. Leap yr Leap yr Jan. Leap yr Leap yr Leap yr Feb. Leap yr Apr. Sep. June Mar. Aug. May Oct. Apr. Sep. June Mar. Aug. May July Dec. Nov. July Dec. Nov. Com yr Com yr Com yr Feb. Com yr Com yr Jan. Com yr Com yr Com yr Feb. Com yr Com yr 18

19 Notes: 1. The top row of the month table part of the slider is for January and February in leap years. Jan. and Feb. are in boldface to indicate that they apply to leap years. 2. The bottom row of the month table part of the slider is for January and February in common years. 3. The slider is in its rightmost position, and all columns are shown. The bold outline is the window. 4. Use this slider with Table A3-9a, 9b or 9c for the year table. Tables for single-sheet perpetual calendars with single slider with side year tables Table A3-16 Completed Slider for Narrow-Face Single-Slider Calendar with Side Year Tables L yr Jan. L yr L yr L yr Feb. L yr Jan. L yr L yr L yr Feb. L yr Oct. Apr. Sep. June Mar. Aug. May Apr. Sep. June Mar. Aug. May July Dec. Nov. July Dec. Nov. Jan. C yr C yr C yr Feb. C yr C yr C yr C yr C yr Feb. C yr C yr Note: Jan. and Feb. are in boldface in the top row of the month part of the table to indicate that they are associated with leap years. 19

20 Table A3-17 Year Tables for Narrow-Face Single-Slider Calendar with Side Year Tables When March through December Are Shared Between Common Years and Leap Years a. Year table on left side of window b. Year table on right side of window Note: Leap years are in boldface. The following procedure is used to add years not shown to Tables 3-17a and 3-17b: 1. Imagine that the columns in Table 3-17a are labeled Sunday to Saturday from left to right and the columns in Table 3-17b are labeled Sunday to Friday. 2. If the year is a common year, enter it in Table 3-17a under the day of the week that January 1 falls on. If January 1 falls on Sunday to Friday, also enter the year in Table 3-17b. 3. If the year is a leap year, enter it in Table 3-17a under the day of the week after the day of the week that January 1 falls on. If the day of the week after the day of the week that January 1 falls on is Sunday to Friday, also enter the year in Table 3-17b. 20

21 Tables for single-slider vertical calendar Table A3-18 Single-Slider Vertical Calendar Applicable years, 20 Leap years are in boldface L yr All years C yr Sun May Mon Feb Aug Tue Mar Nov Feb Wed Jun Thu Sep Dec Fri Jan Apr Jul Sat Oct Jan Sun 8 May Mon 9 INSTRUCTIONS 1. Move slider up and down to put month beside year. 2. Use left-hand side of slider for January and February in leap years and right-hand side for common years. 3. Ignore 29, 30 and 31 when applicable. Feb Aug Tue 10 Mar Nov Feb Wed 11 Jun Thu 12 Sep Dec Fri 13 Jan Apr Jul Sat 14 L yr All years C yr Sun 15 Mon 16 Tue 17 Wed 18 Thu 19 Fri 20 Sat 21 Sun 22 Mon 23 Tue 24 Wed 25 Thu 26 Fri 27 Sat 28 Sun 29 Mon 30 Tue 31 Wed Thu Fri Sat Sun Mon Note: The section with the thick outline is a slider that moves up and down. It is shown in its lowest position. This is the setting for January and October in

22 The following procedure is used to add years not shown to Table 3-18: 1. Imagine that the rows in the year table are labeled Saturday to Sunday from top to bottom. 2. If the year is a common year, then enter it beside the day of the week that January 1 falls on. 3. If the year is a leap year, then enter it beside the day of the week after the day of the week that January 1 falls on. Variations of the single-sheet perpetual calendar The tables in Sections A2 to A4 can be used to make the following variations of the single-sheet perpetual calendar: 1. Dual-slider, which has the year table beside the day-of-month window. (Use Tables A3-1, A3-8 and A3-9.) 2. Dual-slider, which has the year table above the day-of-month window. (Use Tables A3-1, A3-8 and A3-9. Modify Table A3-8 so that the marker is in the same column as January common year.) 3. Single-slider, with the year table below the day-of-month window and the slider. (Use Table A3-12 for the month and year tables. The year table in Table A3-12 is Table A3-9b. If preferred, Table A3-9a or A3-9c can be used instead.) 4. Single-slider, with the year table above the day-of-month window and the slider. (Use Table A3-12 with the slider modified so that the month table is above the day-of-month table instead of below it.) 5. Single-slider, with year tables beside the day-of-month window. (Use Tables A3-16 and A3-17.) 6. Single-slider vertical calendar. (Use Table A3-18.) Note that all of these variations have March through December in the month table being the same for common and leap years. Other than Table A3-1, all of the tables referred to in these variations are either Table A3-8 for the month table, or A3-9 for the year table, or derivations of them. Similar calendars can be made using Table A3-6a or A3-6b as the month table and Table A3-7 as the year table, or derivations of them. When these tables are used, all the months in the month table for common years are separate from the ones for leap years. The single-slider design with the year table below or above the slider is ideal for a simple desk calendar where height is not a concern. The dual-slider design with the year table to one side requires less height and is preferred when a picture is above the calendar or key hooks are below it. An advantage of the dual-slider design over the single-slider design is that once the month slider is set for the year of interest, the day of the week that the first of each month falls on is displayed. Where minimum height is desired, the single-slider design with year table(s) beside the day-of-month window is an alternative to the dual-slider design. The single-slider vertical calendar can be used for planners, wall calendars and lamps. 22

23 Tables for multisheet and full year perpetual calendars Table A4-1 Day-of-Month Tables for a Common Year with February Modified for 12-Sheet Design January February Ignore February 29 in common years. March April May June July August

24 September October November December Table A4-3 Leap Year Day-of-Month Tables for January and February for the 14-Sheet Design January Leap Year February Leap Year

25 Table A4-7 Year Table for the 14-Sheet Design, and for March through December for the 12-Sheet Design with a Year Table on Each Sheet Notes: Leap years are in boldface To add years, imagine that the columns are labeled Saturday to Sunday from left to right Common years are under the column for the day of the week that January 1 falls on. Leap years are under the column for the day of the week after the day that January 1 falls on

26 Table A4-8 Year Table for January and February for the 12-Sheet Design with a Year Table on Each Sheet Notes: Leap years are in boldface To add years, imagine that the columns are labeled Saturday to Sunday from left to right. Both leap years and common years are under the column for the day of the week that January 1 falls on Table A4-9 Year Table for the Multisheet Calendar with a Single Year Table 14 Sheets Note: This table is the same as Table A3-9b. 26

27 Table A4-12b Typical Day-of-Month Sheet for a Seven-Column Multisheet Perpetual Calendar with a Single Year Table Sun. Mon. Tue. Wed. Thu. Fri. Sat Note: This sheet is for the first of the month on Tuesday. There are similar sheets for every day of the week. Table A-13 Year Table for Single-Sided Slider Full-Year Perpetual Calendar APPLICABLE YEARS 20 LEAP YEARS ARE BOLD This table is part of Figure 8-2b in Practical Perpetual Calendars. Variations of multisheet perpetual calendar The tables in Section A6 can be used to make the following calendars: 1. Multisheet with a year table on each sheet 14 sheets. (Use Tables A4-1, A4-3 and A4-7.) 2. Multisheet with a year table on each sheet 12 sheets. (Use Tables A4-1, A4-7 and A4-8.) 3. Multisheet with a single year table 14 sheets. (Use Tables A4-1, A4-3 and A4-9.) 4. Single-sided slider full-year calendar. (Use Tables A4-1 and A4-3 for the day-of-month tables, along with the year table in Table A Seven-column multisheet calendar with a single year table. (Use Table 3-8 for the month table, which is on a slider, and Table 3-9a, 3-9b or 3-9c for the year table. Use concepts from Table A4-12b to develop a day-of-month sheet for each of the seven days of the week.) 27

28 Figure 1-1: Front cover of Practical Perpetual Calendars 28

29 APRIL S M T W T F S Figure 2-1: Wall calendar on cover of Practical Perpetual Calendars 29

30 APRIL a) Year table above day of month table Instructions 1. Cut out the calendar sheet and window along their outside borders. 2. Cut slits along the dark lines. There are two horizontal slits on the calendar sheet and one "H" shaped slit on the window. 3.Tuck the top and bottom window flaps behind the day of month table and tape the ends together. S M T W T F S Top flap Bottom flap Figure 2-2: Calendar sheet and window for converting an existing wall calendar to a perpetual calendar (Figure 6-7a in Practical Perpetual Calendars) 30

31 month table APRIL Notes 1. Calendar is assumed to be made from 11 sheets, which is used 2. The top area, which is shown as being for a picture, can have other information such as permanent dates. For example, March and April can have dates for Easter Sunday. 3. The Day Window S M T W T F S Figure 2-3: Calendar sheet and window for a wall calendar from scratch 31

32 Cut a slit on each side Instructions 1. Cut out the calendar sheet and window along their outside borders. 2. Cut the two window slits along the dark lines. 3. Thread calendar sheet through the two slits 4. Glue each end of calendar sheet to base. J A N U A R Y Leap years are bold. J A N U A R Y S M T W T F S Figure 2-4: Calendar sheet and window with year table below day-of-month table (Figure 6-7b in Practical Perpetual Calendars) 32

33 S M T W T F S LEAP YR FEB LEAP YR LEAP YR LEAP YR JAN LEAP YR COM YR COM YR FEB COM YR COM YR COM YR JAN MAY AUG MAR JUN SEP APR OCT NOV DEC JUL INSTRUCTIONS 1. Move the top slider so that the marker is over the column that has the year of interest. 2. Move the bottom slider to line up the "1" with the month of interest. 3. Ignore dates 29, 30 and 31 when applicable. 4. Use the top row for January and February of leap years and the next to the top row for January and February of common years. Leap years are bold. Figure 3-1: Clock with single-sheet dual-slider calendar below it (Figure 5-8 in Practical Perpetual Calendars) 33

34 A picture or an image can go in this area. LEAP YR LEAP YR LEAP YR FEB LEAP YR LEAP YR JAN SEP JUN MAR AUG MAY OCT APR DEC NOV JUL COM YR COM YR FEB COM YR COM YR JAN COM YR S M T W T F S INSTRUCTIONS 1. Set month under year. 2. Leap years are bold. Use top row of month table for January and February. 3. Ignore 29, 30 and 31 when applicable. Figure 3-2: Clock with single-sheet single-slider calendar below it (Figure 5-9 in Practical Perpetual Calendars) 34

35 S M T W T F S Make a two slits on each side of the window for the slider to go under and then back up. INSTRUCTIONS 1. Set month over year. 2. Leap years are bold. 3. Ignore 29, 30 and 31 as applicable /30 24/ LEAP YRLEAP YR FEB LEAP YR JAN LEAP YRLEAP YRLEAP YR FEB LEAP YRLEAP YR JAN LEAP YR APR SEP JUN MAR AUG MAY OCT APR SEP JUN MAR AUG MAY JUL DEC NOV JUL DEC NOV COM YRCOM YRCOM YR FEB COM YRCOM YR JAN COM YRCOM YRCOM YR FEB COM YRCOM YR DAYS PER MONTH JAN 31 JUL 31 FEB 28/29 AUG 31 MAR 31 SEP 30 APR 30 OCT 31 MAY 31 NOV 30 JUN 30 DEC 31 Drawing notes 1 Cell widths are 2 instead of usual 3. 2 The rows for the day of month (numbers 1 to 31) are 10 high instead of usual Print at 40 to 50% of normal size. Figure 4-1: Single-sheet single-slider pocket calendar with moving slider (Figure 5-3b in Practical Perpetual Calendars) 35

36 RED DEER ALBERTA CANADA S M T W T F S Cut a slit along each side INSTRUCTIONS 1. Set month over year. 2. Leap years are bold. Use top row of month table for January and February. 3. Ignore 29, 30 and 31 when applicable NOTES 1. Year table is Table A3-9b. 2. Slider is Table A3-12. JAN LEAP YR LEAP YR LEAP YR FEB LEAP YR LEAP YR JAN LEAP YR LEAP YR LEAP YR FEB LEAP YR APR SEP JUN MAR AUG MAY OCT APR SEP JUN MAR AUG MAY JUL DEC NOV JUL DEC NOV COM YR FEB COM YR COM YR COM YR COM YR COM YR FEB COM YR COM YR JAN COM YR COM YR To identify the current year, a pin can be put into the dot above the applicable column. For 20th century, pull out table installed behind rear picture. If desired, slits can be cut beside the 21st century table to hold the 20th century table. A good website for finding holidays and phases of the moon is How the Year Table is Constructed For Common Years, the year is under the day of the week that January 1 falls on. For example, January 1, 2001 was on a Monday. For Leap Years, the year is under the day of the week after the day of the week that January 1 falls on. For example, January 1, 2000 was on a Saturday. Figure 4-2: Single-sheet single-slider tent desk calendar made from one 8.5 x 11 sheet of cardstock (Reference: Figures 5-1a and 5-1b in Practical Perpetual Calendars) 36

37 S M T W T F S /30 24/ Put year under month. Leap years are bold. Push Push 1 2 Cut slits on right and left sides JAN LEAP YRLEAP YRLEAP YR FEB LEAP YRLEAP YR JAN LEAP YRLEAP YRLEAP YR FEB LEAP YR APR SEP JUN MAR AUG MAY OCT APR SEP JUN MAR AUG MAY JUL DEC NOV JUL DEC NOV COM YRCOM YRCOM YR FEB COM YRCOM YR JAN COM YRCOM YRCOM YR FEB COM YRCOM YR 3 Thread table sheet through the slits in the window and then glue each end in these areas. Dashed lines are outline of the table sheet. Parts List 1 Moving window 2 Base (can be back of a notepad cover) 3 Table sheet Figure 4-3: Single-sheet single-slider pocket calendar with moving window (Figure 5-3a in Practical Perpetual Calendars) 37

38 Cut along this line All headings above the numbers are for reference only. JAN LEAP YEAR FEB LEAP YEAR S M T W T F S S M T W T F S JAN COMMON YEAR FEB COMMON YEAR MAR S M T W T F S S M T W T F S S M T W T F S APR MAY JUNE S M T W T F S S M T W T F S S M T W T F S JULY AUG SEP S M T W T F S S M T W T F S S M T W T F S Cut along bottom line OCT NOV DEC S M T W T F S S M T W T F S S M T W T F S Figure 5-1: Slider for single-sided slider full-year perpetual calendar (Figure 8-2a in Practical Perpetual Calendars) 38

39 APPLICABLE YEARS 20 JAN LEAP YEAR FEB LEAP YEAR LEAP YEARS ARE BOLD S M T W T F S S M T W T F S JAN COMMON YEAR FEB COMMON YEAR MAR S M T W T F S S M T W T F S S M T W T F S Top edge of cardstock sheet APR MAY JUNE S M T W T F S S M T W T F S S M T W T F S JULY AUG SEP S M T W T F S S M T W T F S S M T W T F S OCT NOV DEC S M T W T F S S M T W T F S S M T W T F S Cut a slit on each side to hold and guide slider Cardstock sheet is 8.5 in. high by 11 in. wide. Do not trim edges. Bottom edge of cardstock sheet APPLICABLE YEARS 20 LEAP YEARS ARE BOLD Figure 5-2: Face of the full-year calendar with single-sided slider (Figure 8-2b in Practical Perpetual Calendars with an enlarged and rotated year table shown below the face) 39

40 The years that apply to the setting are in the column above the marker Leap years are bold. Cut along sides & bottom (light lines) Cut along sides & top (light lines) Flip up pad to see years that apply to setting Body, showing year table and cutouts for slider LEAP YR FEB LEAP YR LEAP YR LEAP YR JAN LEAP YR LEAP YR FEB LEAP YR LEAP YR LEAP YR JAN COM YR COM YR FEB COM YR COM YR COM YR JAN COM YR COM YR FEB COM YR COM YR COM YR MAY AUG MAR JUN SEP APR MAY AUG MAR JUN SEP APR NOV DEC JUL OCT NOV DEC JUL Slider Figure 6-1: Seven-column multisheet calendar with a single year table body and slider (Figure 7-6a in Practical Perpetual Calendars) 40

41 SUN MON TUE WED THU FRI NOTE: This marker is on the day of month sheet and should not be confused with the marker on the slider shown in Figure 7-6a. SAT LEAP YR FEB LEAP YR LEAP YR LEAP YR JAN LEAP YR COM YR COM YR FEB COM YR COM YR COM YR JAN MAY AUG MAR JUN SEP APR NOV DEC JUL OCT Flip up pad to see years that apply to setting Operating Notes 1. Flip up pad of day of month sheets so that year table can be seen. 2. Set black marker on slider under the column that has the year of interest.. Note that leap years are bold. 3. Flip down pad. Find month of interest in window. Use top row for January and February of leap years and next to top row for common years. 4. Turn to the calendar sheet that has a black mark that lines up with the black mark for the month of interest. Construction Notes for Windows and Installing Slider 1. Cut along three sides of each window as shown in Figure 6-9a. 2. Cut a piece of wax paper the approximate length of the slider and not quite as wide. 3. Thread the wax paper into where the slider should go. 4. Cut a piece of cardstock the width of the slider and the length of the windows. 5. Glue the cardstock to the backs of the two window flaps. 6. Remove the wax paper and thread the slider in its place. Slider set in the position that applies to 2016 (far right). The day of month sheet applies to January, April and July of 2016 Figure 6-2: Seven-column multisheet calendar with a single year table body and slider (Figure 7-6b in Practical Perpetual Calendars) 41

42 SUN MON TUE WED THU FRI SAT SUN MON TUE WED THU FRI SAT SUN MON TUE WED THU FRI SAT SUN MON TUE WED THU FRI SAT SUN MON TUE WED THU FRI SAT SUN MON TUE WED THU FRI SAT SUN MON TUE WED THU FRI SAT Figure 6-3: Seven-column multisheet calendar with a single year table day-of-month sheets (Figure 7-6c in Practical Perpetual Calendars) 42

43 JANUARY LEAP YEAR JANUARY COMMON YEAR / MARCH JULY S M T W T F S / Notes 1. These sheets are for the 14-sheet design 2. The year tables are from Table 4-7. For January and February common years, only common years are shown. For January and February leap years, only leap years are shown. 3. The day of month tables are as follows: Table 4-1 for January and February common years and March to December all years Table 4-3 for January and February leap years 4. The sheet for July is shown in the assembled tent calendar. The window is set for Figure 7-1: Typical month sheets for a 14-sheet flip-down-window desk calendar (Figure 6-1a in Practical Perpetual Calendars) 43

44 Moving window with back flap Wire-O Binding for binding calendar sheets together and attaching them to the cardstock tent. (Only three of the 14 calendar sheets are shown.) S M T W T F S Moving window side view when installed. Threading through the slits is not shown. Cut out window. Turn knob down when flipping down the window to change the month. Fold back along dashed lines. Recommended thickness of bottom piece is thickness of the 14 sheets plus 1/16 inch. Cut slits for window back flap to slide in. Front of tent when calendar sheets and moving window are not present. Front is drawn to a smaller scale that the other parts. Assembly Instructions 1. Cut out window and tent pieces including the slits in the front of the tent. These pieces are cardstock. 2. Bind ends of tent and calendar sheets together using Wire-O binding. 3. Glue bottom piece to front of tent and attach the knob. These pieces are stiff material, such as hardboard or wood. 4. Glue strips of cardstock that have a 90-degree fold or other material to the back side of the front to stiffen it. Take care to ensure that material for stiffening will not interfere with the window movement. 5. Flip all the calendar sheets to the back so the window can be installed. The back flap of the window is threaded to the back through the bottom slit and back to the front through the top slit. Figure 7-2: Flip-down window desk calendar made from cardstock (Figure 6-1b in Practical Perpetual Calendars) 44

45 Lift-out window Wire-O Binding for binding calendar sheets together and attaching them to the cardstock tent. (Only three of the 14 calendar sheets are shown.) S M T W T F S Lift-out window side view when installed. Cut out window. Recommended width of gap is thickness of the 14 sheets plus thickness of window plus 1/16 inch. Track for window along the bottom of the tent. The track can be two pieces as shown or one piece with a rabbet cut in it. Parts List 1. Lift-out window. Suggested material is 1/8-inch thick hardboard with a window cut out. Could be glass with a window drawn on it. 2. Track. Suggested material is a strip of wood with a strip of hardwood glued to it. Alternatively, the track can be a strip of wood with a rabbet cut in it. 3. Tent and calendar sheets bound with Wire-O binding. Except for the printing, the tent and calendar sheets are identical to what is in a conventional calendar. Depending on the conventional calendar being replaced, the tent may have to be a little higher to have room for the track along the bottom. 4. and 5. A secondl lift-out window and track for back so that calendar is the same on both sides. If these pieces are not used, the back sides of the calendar sheets will have pictures rather than calendar tables. Figure 7-3: 13-column desk calendar with a lift-out window instead of a flip-down window 45

46 Let the Music Play SW corner City Hall Park S M T W T F S MARCH Figure 7-4: 13-column desk calendar with a lift-out pad (reference Figures 1-2c and 6-2 in Practical Perpetual Calendars) 46

47 Leap Years (Use top row for Jan. & Feb.) Common Years (Use next to top row for Jan. & Feb.) LEAP YR FEB LEAP YR LEAP YR LEAP YR JAN COM YR COM YR FEB COM YR COM YR COM YR JAN MAY AUG MAR JUN SEP APR OCT NOV DEC JUL S M T W T F S RED DEER PLUMBING AND HEATING LTD. INSTRUCTIONS 1. Lift up picture to see year table. 2. Move top slider so that marker is under the column that has the year of interest 3. Move bottom slider to line up the "1" with the month of interest. 4. Ignore dates 29, 30 and 31 when applicable. Figure 8-1: Single-sheet perpetual tent calendar with dual sliders (reference Figures 1-1c and 5-6b in Practical Perpetual Calendars) 47

48 11 DASHED LINES ARE SPACERS UNDER LEFT AND RIGHT PANELS FRONT VIEW SIDE VIEW LETTERS SMTWTFS ARE PRINTED ABOVE SLIDER ON THE SPACER HOLES FOR HANGING 2 Leap Years (Use top row for Jan. & Feb.) Common Years (Use next to top row for Jan. & Feb.) S S M T W T F 1 2 LEAP YR FEB LEAP YR LEAP YR LEAP YR JAN LEAP YR COM YR COM YR FEB COM YR COM YR COM YR JAN MAY AUG MAR JUN SEP APR OCT NOV DEC JUL & 3 DAY OF MONTH SLIDER GOES IN HERE MONTH SLIDER GOES IN HERE LEAP YR FEB LEAP YR LEAP YR LEAP YR JAN COM YR COM YR FEB COM YR COM YR COM YR JAN COM YR COM YR NOV DEC JUL LEAP YR LEAP YR FEB LEAP YR LEAP YR LEAP YR FEB COM YR NOV DEC JUL COM YR COM YR OCT MAY AUG MAR JUN SEP MAY AUG MAR JUN SEP APR APR 10 JAN PARTS LIST ITEM COMMENT 1 Left panel, approx. 2.5 in. by 2.5 in. Suggested material 1/8 in. thick hardboard. Cover with year table printed on cardstock. 2 Back approx., 4 in. by 7.5 in. Same material as item 1. 3 Right panel. Same size and same material as item 1. Cover with artwork printed on cardstock or burn artwork on panel 4 Top spacer, approx. 3/8 in. by 7.5 in. Suggested material 1/8 in. thick hardboard, with thickness built up with cardstock so that it is slightly thicker than sliders. Cover centre part with SMTWTFS on cardstock, or paint or burn letters on. 5 Bottom spacer. Same size and same material as item 4. 6 Block for key hooks, approx. 1.0 in. by 7.5 in. Suggested material spruce or pine board of one inch nominal thickness or 3/4 in. plywood. 7 Hooks for keys, 5 required. Cornice hooks size 1.25 in. or 1.5 in. can be used. 8 Month slider, approx. 3/4 in. by 4.5 in. Suggested material 1/8 in. thick hardboard. Cover with month table printed on cardstock. 9 Day of month slider, approx. 1.5 in. by 4.5 in. Same material as item 8. Cover with day of month table printed on cardstock. 10, 11 Push knobs for sliders. Wood screws #6 by 3/8 in. or small bolts can be used. Set with epoxy. Note that Item #11 also serves as a marker to point to the applicable year column. Faces The easiest way to make the tables on the sliders and the left panel, and the design on the right panel is to print on cardstock and glue to the surfaces. Figure 8-2: Key holder with a dual slider calendar (Figure 5-7a in Practical Perpetual Calendars) 48

49 LEAP YR JAN COM YR COM YR COM YR FEB JAN COM YR COM YR COM YR FEB COM YR COM YR JAN LEAP YR LEAP YR LEAP YR COM YR COM YR COM YR FEB 1 S M T W T S F OCT APR SEP JAN LEAP YR 31 JUL DEC NOV LEAP YR LEAP YR FEB LEAP YR JUN MAR AUG MAY COM YR COM YR COM YR FEB COM YR COM YR JAN LEAP YR LEAP YR LEAP YR FEB APR SEP JUN MAR AUG JUL DEC NOV LEAP YR MAY COM YR COM YR LEAP YR JAN LEAP YR LEAP YR LEAP YR FEB LEAP YR FEB LEAP YR OCT APR SEP JUN MAR AUG MAY JUL DEC NOV APR SEP JUN MAR JUL DEC NOV AUG MAY COM YR COM YR Figure 8-3: Key holder with a single slider calendar (Figure 5-7b in Practical Perpetual Calendars) 49

50 F / Cut out this window JULY S M T W T S Meeting Creek, AB Canada SET THE MARKER OVER THE YEAR LEAP YEARS ARE BOLD Figure 9-1 Fixed window style multisheet perpetual calendar with a single year table (Figures 1-3a and 7-1c in Practical Perpetual Calendars) 50

51 Figure 10-1 Ornate hybrid wall calendar (Figure 5-17a in Practical Perpetual Calendars) 51