File:French Calendar Medal, 1778 (35142074520).jpg
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Summary
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| Description |
This is a French calendar medal for the year 1778. The side on the right displays a table listing all of the Sundays in 1778. For example, February, March and November 1st, 8th, 15th, 22nd and 29th are all Sundays. Above the table is the text "Almanac for the year 1778". To the left, is the date of Corpus Christi (Fête Dieu) - June 18th and Advent - November 29th. To the right of the table is the date of the Ascension - May 28th and Pentecost - June 7th. Below the table is the date of Septuagesim, the ninth Sunday before Easter - February 15th, Ash Wednesday - March 4th and Easter - April 19th. The side on the left shows a table listing the number of days in each month and the date of the full moon and the new moon. Above the table is the birth date of Louis XVI, August 23rd, 1754 and Marie Antoinette, November 2nd, 1755. Below the table are the dates for the start of each season: Spring - March 20th, Summer - June 21st, Autumn - September 22nd, and Winter - December 21st. To the left and right of the table is information necessary for the Computus calculation, used to calculate the date of Easter. The right shows that 1778 is year 23 of the 28 year solar cycle of the Julian calendar and 1778's "golden number" (nombre d'or) is 12. The golden number is the year's number in the 19 year Metonic cycle and is calculated with the formula: year mod 19 + 1. To the left of the table is the "Lettre Dominicale" or dominical letter of D. Each day of the year is associated with the letters A to G, starting with January 1st and repeating to the end of the year. For example, January 1 is A, January 2 is B, January 7 is G, January 8 is A, etc. The year's dominical letter is the letter associated with the first Sunday of the year. For 1778, the first Sunday is January 4th, hence the dominical letter is D. Finally, the "Indiction Rom 11" refers to a fiscal period of 15 years used as a mean of dating events and transactions in the Roman Empire. The 11 is calculated using the formula (year + 2) mod 15 + 1. All of this information is used in the very complex calculations required to determine the date of Easter. Details on the Computus calculation are available here: <a href="https://en.wikipedia.org/wiki/Computus" rel="nofollow">en.wikipedia.org/wiki/Computus</a> This piece is well worn which indicates that it was probably used as a pocket piece for many years. |
| Date | |
| Source | French Calendar Medal, 1778 |
| Author | Joe deSousa |
Licensing
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This file is made available under the Creative Commons CC0 1.0 Universal Public Domain Dedication. |
| The person who associated a work with this deed has dedicated the work to the public domain by waiving all of their rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law. You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission.
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This image was originally posted to Flickr by Mustang Joe at https://flickr.com/photos/63234672@N04/35142074520 (archive). It was reviewed on 3 March 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-zero. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 04:27, 3 March 2019 | | 7,568 × 3,936 (18.92 MB) | Tm (talk | contribs) | Transferred from Flickr via #flickr2commons |
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