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perpetual calendar free plans: how to make a
Perpetual Calendar
Basic Description

watch the
animated intro
This is an amazing calendar that remains functional for thousands of years. We have three versions: the first is an online version intended for online viewing and printing of selected pages. The year-at-a-glance version uses fourteen ordinary sheets of paper and extends from the year 1600 to 10000. Our favorite is the monthly version that spans 2800 years and fits on 28 sheets of paper. If you used traditional wall calendars during that period, you would need at least 30,000 sheets of paper! Don't worry these aren't microscopic: the pages are full-size.
Materials Paper


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Now lets print the calendars. Again, each calendar has two files: one for the fronts and one for the backs. After printing the fronts of the set, then you take the stack and print out the back sides--orienting the stack in the same way that you did during the test. Note that the monthly view requires 28 sheets of paper, and the yearly view requires 14 sheets.
A note about materials. You are about to print a calendar that will be functional for thousands of years. The pages will be handled frequently so we recommend that you opt for the best quality and durable paper that you can find. Heavy acid-free or archival-quality paper is probably the best bet, but of course any paper you choose will work. Laser and ink-jet printers have not been around long enough to determine the longevity of prints. While the ink may fade after a significant number of years, we reckon that the calendars will be readable for a sufficient period of time.
a balinese dancer

Letter paper:


A4 paper:



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