![\"Calendrier-republicain-debucourt2,](\"http:\/\/wordpress.library.illinois.edu\/mtx\/wp-content\/uploads\/sites\/18\/2017\/01\/Calendrier-republicain-debucourt2.jpg\")
<\/a>By Debucourt, Philibert Louis (Biblioth\u00e8que nationale de France) <\/p>\n
[Public domain], via Wikimedia Commons<\/figcaption><\/figure>\n
Spring<\/h3>\n\n\t\t\t\n\t\t\t\t![\"Germinal_commence_le_21_ou_22_mars,](\"https:\/\/wordpress.library.illinois.edu\/mtx\/wp-content\/uploads\/sites\/18\/2017\/01\/Germinal_commence_le_21_ou_22_mars-150x150.jpg\")
<\/a>\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\tGerminal (“Seedtime”)
By Tresca, Salvatore (Graveur) \u2013 Lafitte, Louis (Dessinateur du mod\u00e8le)
[Public domain], via Wikimedia Commons\n\t\t\t\t<\/figcaption><\/figure>\n\t\t\t\n\t\t\t\t![\"Flor\u00e9al_commence_le_21_avril,](\"https:\/\/wordpress.library.illinois.edu\/mtx\/wp-content\/uploads\/sites\/18\/2017\/01\/Flor\u00e9al_commence_le_21_avril-150x150.jpg\")
<\/a>\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\tFlor\u00e9al (“Blossom”)
By Tresca, Salvatore (Graveur) \u2013 Lafitte, Louis (Dessinateur du mod\u00e8le)
[Public domain], via Wikimedia Commons\n\t\t\t\t<\/figcaption><\/figure>\n\t\t\t\n\t\t\t\t![\"Prairial_commence_le_21_mai,](\"https:\/\/wordpress.library.illinois.edu\/mtx\/wp-content\/uploads\/sites\/18\/2017\/01\/Prairial_commence_le_21_mai-150x150.jpg\")
<\/a>\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\tPrairial (“Meadow”)
By Tresca, Salvatore (Graveur) \u2013 Lafitte, Louis (Dessinateur du mod\u00e8le)
[Public domain], via Wikimedia Commons\n\t\t\t\t<\/figcaption><\/figure>\n\t\t<\/div>\n\nSummer<\/h3>\n\n\t\t\t\n\t\t\t\t![\"Messidor_commence_le_21_ou_22_juin,](\"https:\/\/wordpress.library.illinois.edu\/mtx\/wp-content\/uploads\/sites\/18\/2017\/01\/Messidor_commence_le_21_ou_22_juin-150x150.jpg\")
<\/a>\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\tMessidor (“Harvest”)
By Tresca, Salvatore (Graveur) \u2013 Lafitte, Louis (Dessinateur du mod\u00e8le)
[Public domain], via Wikimedia Commons\n\t\t\t\t<\/figcaption><\/figure>\n\t\t\t\n\t\t\t\t![\"Thermidor_commence_le_20_ou_21_juillet,](\"https:\/\/wordpress.library.illinois.edu\/mtx\/wp-content\/uploads\/sites\/18\/2017\/01\/Thermidor_commence_le_20_ou_21_juillet-150x150.jpg\")
<\/a>\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\tThermidor (“Heat”)
By Tresca, Salvatore (Graveur) \u2013 Lafitte, Louis (Dessinateur du mod\u00e8le)
[Public domain], via Wikimedia Commons\n\t\t\t\t<\/figcaption><\/figure>\n\t\t\t\n\t\t\t\t![\"Fructidor_commence_le_21_ou_22_ao\u00fbt,](\"https:\/\/wordpress.library.illinois.edu\/mtx\/wp-content\/uploads\/sites\/18\/2017\/01\/Fructidor_commence_le_21_ou_22_ao\u00fbt-150x150.jpg\")
<\/a>\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\tFructidor (“Fruits”)
By Tresca, Salvatore (Graveur) \u2013 Lafitte, Louis (Dessinateur du mod\u00e8le)
[Public domain], via Wikimedia Commons\n\t\t\t\t<\/figcaption><\/figure>\n\t\t<\/div>\n\nAutumn<\/h3>\n\n\t\t\t\n\t\t\t\t![\"Vend\u00e9miaire_commence_le_22_septembre,](\"https:\/\/wordpress.library.illinois.edu\/mtx\/wp-content\/uploads\/sites\/18\/2017\/01\/Vend\u00e9miaire_commence_le_22_septembre-150x150.jpg\")
<\/a>\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\tVend\u00e9miaire (“Vintage”)
By Tresca, Salvatore (Graveur) \u2013 Lafitte, Louis (Dessinateur du mod\u00e8le)
[Public domain], via Wikimedia Commons\n\t\t\t\t<\/figcaption><\/figure>\n\t\t\t\n\t\t\t\t![\"Brumaire_commence_le_23_octob,](\"https:\/\/wordpress.library.illinois.edu\/mtx\/wp-content\/uploads\/sites\/18\/2017\/01\/Brumaire_commence_le_23_octobre-150x150.jpg\")
<\/a>\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\tBrumaire (“Mist”)
By Tresca, Salvatore (Graveur) \u2013 Lafitte, Louis (Dessinateur du mod\u00e8le)
[Public domain], via Wikimedia Commons\n\t\t\t\t<\/figcaption><\/figure>\n\t\t\t\n\t\t\t\t![\"Frimaire_commence_le_22_novembre,](\"https:\/\/wordpress.library.illinois.edu\/mtx\/wp-content\/uploads\/sites\/18\/2017\/01\/Frimaire_commence_le_22_novembre-150x150.jpg\")
<\/a>\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\tFrimaire (“Frost”)
By Tresca, Salvatore (Graveur) \u2013 Lafitte, Louis (Dessinateur du mod\u00e8le)
[Public domain], via Wikimedia Commons\n\t\t\t\t<\/figcaption><\/figure>\n\t\t<\/div>\n\nWinter<\/h3>\n\n\t\t\t\n\t\t\t\t![\"Niv\u00f4se_commence_le_22_d\u00e9cembre,](\"https:\/\/wordpress.library.illinois.edu\/mtx\/wp-content\/uploads\/sites\/18\/2017\/01\/Niv\u00f4se_commence_le_22_d\u00e9cembre-150x150.jpg\")
<\/a>\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\tNiv\u00f4se (“Snow”)
By Tresca, Salvatore (Graveur) \u2013 Lafitte, Louis (Dessinateur du mod\u00e8le)
[Public domain], via Wikimedia Commons\n\t\t\t\t<\/figcaption><\/figure>\n\t\t\t\n\t\t\t\t![\"Pluvi\u00f4se_commence_le_21_ou_22_janvier,](\"https:\/\/wordpress.library.illinois.edu\/mtx\/wp-content\/uploads\/sites\/18\/2017\/01\/Pluvi\u00f4se_commence_le_21_ou_22_janvier-150x150.jpg\")
<\/a>\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\tPluvi\u00f4se (“Rain”)
By Tresca, Salvatore (Graveur) \u2013 Lafitte, Louis (Dessinateur du mod\u00e8le)
[Public domain], via Wikimedia Commons\n\t\t\t\t<\/figcaption><\/figure>\n\t\t\t\n\t\t\t\t![\"Vent\u00f4se_commence_le_20_ou_21_f\u00e9vrier,](\"https:\/\/wordpress.library.illinois.edu\/mtx\/wp-content\/uploads\/sites\/18\/2017\/01\/Vent\u00f4se_commence_le_20_ou_21_f\u00e9vrier-150x150.jpg\")
<\/a>\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\tVent\u00f4se (“Wind”)
By Tresca, Salvatore (Graveur) \u2013 Lafitte, Louis (Dessinateur du mod\u00e8le)
[Public domain], via Wikimedia Commons\n\t\t\t\t<\/figcaption><\/figure>\n\t\t<\/div>\n\nHistory<\/h2>\n
During the height of the French Revolution in 1793, France’s National Convention set out to replace the widely used Gregorian calendar with a new version divorced from any Christian associations and instead grounded in logic and reason. The result was the French Republican calendar.<\/p>\n
The design drew inspiration from a similar calendar proposed by French poet and playwright Pierre-Sylvain Mare\u0301chal in 1788. All 12 months received new names and the beginning and ending days of each month were changed to better align with the various equinoxes and the changing seasons. The calendar was implemented on October 5, 1793 and received and official, backdated starting day of 1 Vende\u0301miaire, year I (September 22, 1792 according to the Gregorian calendar).<\/p>\n
France soon became disenchanted with its new calendar through. Transposing dates between the French Republican calendar and the Gregorian calendar complicated communications with other countries and France formally switched back to the Gregorian calendar on January 1, 1806.<\/p>\n
When it came to the technical design of the French Republican calendar, the National Committee enlisted the help of two prominent mathematicians. Joseph-Louis Lagrange (seminal figure in number theory and analytic and celestial mechanics) and Gaspard Monge (inventor of descriptive geometry) collaborated to create the new system.<\/p>\n
The mathematicians’ final design consisted of 12 months of 30 days each. Every month consisted of three, 10-day de\u0301cades<\/em> instead of weeks. The final five days of each 365-day year were set aside for vacations and festivals before the autumnal equinox. Leap days could be added as one more festival day, signifying the end of another four-year period know as Franciade<\/em>.<\/p>\nHistorical information about the calendar came from the following:<\/p>\n
\n- French republican calendar<\/a><\/li>\n
- Calendar reform since the mid-18th century, Britannica Academic<\/a><\/li>\n
- Pierre-Sylvain Mar\u00e9chal<\/a><\/li>\n
- Joseph-Louis Lagrange, comte de l\u2019Empire<\/a><\/li>\n
- Gaspard Monge, count de P\u00e9luse<\/a><\/li>\n<\/ul>\n
Books on Display<\/h2>\n\n- [Cours de mathe\u0301matiques a\u0300 l’usage de l’E\u0301cole centrale des quatre-nations] \/ par S.-F. Lacroix. v.1 (Math 510 L112C)<\/li>\n
- Application de l’analyse a\u0300 la ge\u0301ome\u0301trie, par G. Monge. (Math 516.3 M74A)<\/li>\n
- Journal. v.1(1795-1796) (Math [non-circulating] 505 JO)<\/li>\n
- Kalenderarithmetik \/ Heinz Bachmann. (Math 529.7 B124K)<\/li>\n
- The\u0301orie des fonctions analytiques : contenant les principes du calcul diffe\u0301rentiel, de\u0301gage\u0301s de toute conside\u0301ration d’infiniment petits, d’e\u0301vanouissants, de limites et de fluxions, et re\u0301duits a\u0300 l’analyse alge\u0301brique des quantite\u0301s finies (Math 515.9 L13T1847)<\/li>\n
- Untersuchungen zur Geschichte der tibetischen Kalenderrechnung \/ von Dieter Schuh. (Math 529.3 SCH79U)<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":49,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[2],"tags":[],"class_list":["post-370","post","type-post","status-publish","format-standard","hentry","category-exhibits"],"acf":[],"_links":{"self":[{"href":"https:\/\/wordpress.library.illinois.edu\/mtx\/wp-json\/wp\/v2\/posts\/370","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wordpress.library.illinois.edu\/mtx\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wordpress.library.illinois.edu\/mtx\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wordpress.library.illinois.edu\/mtx\/wp-json\/wp\/v2\/users\/49"}],"replies":[{"embeddable":true,"href":"https:\/\/wordpress.library.illinois.edu\/mtx\/wp-json\/wp\/v2\/comments?post=370"}],"version-history":[{"count":11,"href":"https:\/\/wordpress.library.illinois.edu\/mtx\/wp-json\/wp\/v2\/posts\/370\/revisions"}],"predecessor-version":[{"id":3959,"href":"https:\/\/wordpress.library.illinois.edu\/mtx\/wp-json\/wp\/v2\/posts\/370\/revisions\/3959"}],"wp:attachment":[{"href":"https:\/\/wordpress.library.illinois.edu\/mtx\/wp-json\/wp\/v2\/media?parent=370"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wordpress.library.illinois.edu\/mtx\/wp-json\/wp\/v2\/categories?post=370"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wordpress.library.illinois.edu\/mtx\/wp-json\/wp\/v2\/tags?post=370"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
<\/a>\n\t\t\t<\/div>\n\t\t\t\tBy Tresca, Salvatore (Graveur) \u2013 Lafitte, Louis (Dessinateur du mod\u00e8le)
[Public domain], via Wikimedia Commons\n\t\t\t\t<\/figcaption><\/figure>
<\/a>\n\t\t\t<\/div>\n\t\t\t\tBy Tresca, Salvatore (Graveur) \u2013 Lafitte, Louis (Dessinateur du mod\u00e8le)
[Public domain], via Wikimedia Commons\n\t\t\t\t<\/figcaption><\/figure>
<\/a>\n\t\t\t<\/div>\n\t\t\t\tBy Tresca, Salvatore (Graveur) \u2013 Lafitte, Louis (Dessinateur du mod\u00e8le)
[Public domain], via Wikimedia Commons\n\t\t\t\t<\/figcaption><\/figure>\n\t\t<\/div>\n\n
Summer<\/h3>\n\n\t\t\t\n\t\t\t\t<\/a>\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\tMessidor (“Harvest”)
By Tresca, Salvatore (Graveur) \u2013 Lafitte, Louis (Dessinateur du mod\u00e8le)
[Public domain], via Wikimedia Commons\n\t\t\t\t<\/figcaption><\/figure>\n\t\t\t\n\t\t\t\t<\/a>\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\tThermidor (“Heat”)
By Tresca, Salvatore (Graveur) \u2013 Lafitte, Louis (Dessinateur du mod\u00e8le)
[Public domain], via Wikimedia Commons\n\t\t\t\t<\/figcaption><\/figure>\n\t\t\t\n\t\t\t\t<\/a>\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\tFructidor (“Fruits”)
By Tresca, Salvatore (Graveur) \u2013 Lafitte, Louis (Dessinateur du mod\u00e8le)
[Public domain], via Wikimedia Commons\n\t\t\t\t<\/figcaption><\/figure>\n\t\t<\/div>\n\nAutumn<\/h3>\n\n\t\t\t\n\t\t\t\t<\/a>\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\tVend\u00e9miaire (“Vintage”)
By Tresca, Salvatore (Graveur) \u2013 Lafitte, Louis (Dessinateur du mod\u00e8le)
[Public domain], via Wikimedia Commons\n\t\t\t\t<\/figcaption><\/figure>\n\t\t\t\n\t\t\t\t<\/a>\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\tBrumaire (“Mist”)
By Tresca, Salvatore (Graveur) \u2013 Lafitte, Louis (Dessinateur du mod\u00e8le)
[Public domain], via Wikimedia Commons\n\t\t\t\t<\/figcaption><\/figure>\n\t\t\t\n\t\t\t\t<\/a>\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\tFrimaire (“Frost”)
By Tresca, Salvatore (Graveur) \u2013 Lafitte, Louis (Dessinateur du mod\u00e8le)
[Public domain], via Wikimedia Commons\n\t\t\t\t<\/figcaption><\/figure>\n\t\t<\/div>\n\nWinter<\/h3>\n\n\t\t\t\n\t\t\t\t<\/a>\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\tNiv\u00f4se (“Snow”)
By Tresca, Salvatore (Graveur) \u2013 Lafitte, Louis (Dessinateur du mod\u00e8le)
[Public domain], via Wikimedia Commons\n\t\t\t\t<\/figcaption><\/figure>\n\t\t\t\n\t\t\t\t<\/a>\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\tPluvi\u00f4se (“Rain”)
By Tresca, Salvatore (Graveur) \u2013 Lafitte, Louis (Dessinateur du mod\u00e8le)
[Public domain], via Wikimedia Commons\n\t\t\t\t<\/figcaption><\/figure>\n\t\t\t\n\t\t\t\t<\/a>\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\tVent\u00f4se (“Wind”)
By Tresca, Salvatore (Graveur) \u2013 Lafitte, Louis (Dessinateur du mod\u00e8le)
[Public domain], via Wikimedia Commons\n\t\t\t\t<\/figcaption><\/figure>\n\t\t<\/div>\n\nHistory<\/h2>\n
During the height of the French Revolution in 1793, France’s National Convention set out to replace the widely used Gregorian calendar with a new version divorced from any Christian associations and instead grounded in logic and reason. The result was the French Republican calendar.<\/p>\n
The design drew inspiration from a similar calendar proposed by French poet and playwright Pierre-Sylvain Mare\u0301chal in 1788. All 12 months received new names and the beginning and ending days of each month were changed to better align with the various equinoxes and the changing seasons. The calendar was implemented on October 5, 1793 and received and official, backdated starting day of 1 Vende\u0301miaire, year I (September 22, 1792 according to the Gregorian calendar).<\/p>\n
France soon became disenchanted with its new calendar through. Transposing dates between the French Republican calendar and the Gregorian calendar complicated communications with other countries and France formally switched back to the Gregorian calendar on January 1, 1806.<\/p>\n
When it came to the technical design of the French Republican calendar, the National Committee enlisted the help of two prominent mathematicians. Joseph-Louis Lagrange (seminal figure in number theory and analytic and celestial mechanics) and Gaspard Monge (inventor of descriptive geometry) collaborated to create the new system.<\/p>\n
The mathematicians’ final design consisted of 12 months of 30 days each. Every month consisted of three, 10-day de\u0301cades<\/em> instead of weeks. The final five days of each 365-day year were set aside for vacations and festivals before the autumnal equinox. Leap days could be added as one more festival day, signifying the end of another four-year period know as Franciade<\/em>.<\/p>\nHistorical information about the calendar came from the following:<\/p>\n
\n- French republican calendar<\/a><\/li>\n
- Calendar reform since the mid-18th century, Britannica Academic<\/a><\/li>\n
- Pierre-Sylvain Mar\u00e9chal<\/a><\/li>\n
- Joseph-Louis Lagrange, comte de l\u2019Empire<\/a><\/li>\n
- Gaspard Monge, count de P\u00e9luse<\/a><\/li>\n<\/ul>\n
Books on Display<\/h2>\n\n- [Cours de mathe\u0301matiques a\u0300 l’usage de l’E\u0301cole centrale des quatre-nations] \/ par S.-F. Lacroix. v.1 (Math 510 L112C)<\/li>\n
- Application de l’analyse a\u0300 la ge\u0301ome\u0301trie, par G. Monge. (Math 516.3 M74A)<\/li>\n
- Journal. v.1(1795-1796) (Math [non-circulating] 505 JO)<\/li>\n
- Kalenderarithmetik \/ Heinz Bachmann. (Math 529.7 B124K)<\/li>\n
- The\u0301orie des fonctions analytiques : contenant les principes du calcul diffe\u0301rentiel, de\u0301gage\u0301s de toute conside\u0301ration d’infiniment petits, d’e\u0301vanouissants, de limites et de fluxions, et re\u0301duits a\u0300 l’analyse alge\u0301brique des quantite\u0301s finies (Math 515.9 L13T1847)<\/li>\n
- Untersuchungen zur Geschichte der tibetischen Kalenderrechnung \/ von Dieter Schuh. (Math 529.3 SCH79U)<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":49,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[2],"tags":[],"class_list":["post-370","post","type-post","status-publish","format-standard","hentry","category-exhibits"],"acf":[],"_links":{"self":[{"href":"https:\/\/wordpress.library.illinois.edu\/mtx\/wp-json\/wp\/v2\/posts\/370","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wordpress.library.illinois.edu\/mtx\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wordpress.library.illinois.edu\/mtx\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wordpress.library.illinois.edu\/mtx\/wp-json\/wp\/v2\/users\/49"}],"replies":[{"embeddable":true,"href":"https:\/\/wordpress.library.illinois.edu\/mtx\/wp-json\/wp\/v2\/comments?post=370"}],"version-history":[{"count":11,"href":"https:\/\/wordpress.library.illinois.edu\/mtx\/wp-json\/wp\/v2\/posts\/370\/revisions"}],"predecessor-version":[{"id":3959,"href":"https:\/\/wordpress.library.illinois.edu\/mtx\/wp-json\/wp\/v2\/posts\/370\/revisions\/3959"}],"wp:attachment":[{"href":"https:\/\/wordpress.library.illinois.edu\/mtx\/wp-json\/wp\/v2\/media?parent=370"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wordpress.library.illinois.edu\/mtx\/wp-json\/wp\/v2\/categories?post=370"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wordpress.library.illinois.edu\/mtx\/wp-json\/wp\/v2\/tags?post=370"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
<\/a>\n\t\t\t<\/div>\n\t\t\t\tBy Tresca, Salvatore (Graveur) \u2013 Lafitte, Louis (Dessinateur du mod\u00e8le)
[Public domain], via Wikimedia Commons\n\t\t\t\t<\/figcaption><\/figure>
<\/a>\n\t\t\t<\/div>\n\t\t\t\tBy Tresca, Salvatore (Graveur) \u2013 Lafitte, Louis (Dessinateur du mod\u00e8le)
[Public domain], via Wikimedia Commons\n\t\t\t\t<\/figcaption><\/figure>
<\/a>\n\t\t\t<\/div>\n\t\t\t\tBy Tresca, Salvatore (Graveur) \u2013 Lafitte, Louis (Dessinateur du mod\u00e8le)
[Public domain], via Wikimedia Commons\n\t\t\t\t<\/figcaption><\/figure>\n\t\t<\/div>\n\n
Autumn<\/h3>\n\n\t\t\t\n\t\t\t\t<\/a>\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\tVend\u00e9miaire (“Vintage”)
By Tresca, Salvatore (Graveur) \u2013 Lafitte, Louis (Dessinateur du mod\u00e8le)
[Public domain], via Wikimedia Commons\n\t\t\t\t<\/figcaption><\/figure>\n\t\t\t\n\t\t\t\t<\/a>\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\tBrumaire (“Mist”)
By Tresca, Salvatore (Graveur) \u2013 Lafitte, Louis (Dessinateur du mod\u00e8le)
[Public domain], via Wikimedia Commons\n\t\t\t\t<\/figcaption><\/figure>\n\t\t\t\n\t\t\t\t<\/a>\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\tFrimaire (“Frost”)
By Tresca, Salvatore (Graveur) \u2013 Lafitte, Louis (Dessinateur du mod\u00e8le)
[Public domain], via Wikimedia Commons\n\t\t\t\t<\/figcaption><\/figure>\n\t\t<\/div>\n\nWinter<\/h3>\n\n\t\t\t\n\t\t\t\t<\/a>\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\tNiv\u00f4se (“Snow”)
By Tresca, Salvatore (Graveur) \u2013 Lafitte, Louis (Dessinateur du mod\u00e8le)
[Public domain], via Wikimedia Commons\n\t\t\t\t<\/figcaption><\/figure>\n\t\t\t\n\t\t\t\t<\/a>\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\tPluvi\u00f4se (“Rain”)
By Tresca, Salvatore (Graveur) \u2013 Lafitte, Louis (Dessinateur du mod\u00e8le)
[Public domain], via Wikimedia Commons\n\t\t\t\t<\/figcaption><\/figure>\n\t\t\t\n\t\t\t\t<\/a>\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\tVent\u00f4se (“Wind”)
By Tresca, Salvatore (Graveur) \u2013 Lafitte, Louis (Dessinateur du mod\u00e8le)
[Public domain], via Wikimedia Commons\n\t\t\t\t<\/figcaption><\/figure>\n\t\t<\/div>\n\nHistory<\/h2>\n
During the height of the French Revolution in 1793, France’s National Convention set out to replace the widely used Gregorian calendar with a new version divorced from any Christian associations and instead grounded in logic and reason. The result was the French Republican calendar.<\/p>\n
The design drew inspiration from a similar calendar proposed by French poet and playwright Pierre-Sylvain Mare\u0301chal in 1788. All 12 months received new names and the beginning and ending days of each month were changed to better align with the various equinoxes and the changing seasons. The calendar was implemented on October 5, 1793 and received and official, backdated starting day of 1 Vende\u0301miaire, year I (September 22, 1792 according to the Gregorian calendar).<\/p>\n
France soon became disenchanted with its new calendar through. Transposing dates between the French Republican calendar and the Gregorian calendar complicated communications with other countries and France formally switched back to the Gregorian calendar on January 1, 1806.<\/p>\n
When it came to the technical design of the French Republican calendar, the National Committee enlisted the help of two prominent mathematicians. Joseph-Louis Lagrange (seminal figure in number theory and analytic and celestial mechanics) and Gaspard Monge (inventor of descriptive geometry) collaborated to create the new system.<\/p>\n
The mathematicians’ final design consisted of 12 months of 30 days each. Every month consisted of three, 10-day de\u0301cades<\/em> instead of weeks. The final five days of each 365-day year were set aside for vacations and festivals before the autumnal equinox. Leap days could be added as one more festival day, signifying the end of another four-year period know as Franciade<\/em>.<\/p>\nHistorical information about the calendar came from the following:<\/p>\n
\n- French republican calendar<\/a><\/li>\n
- Calendar reform since the mid-18th century, Britannica Academic<\/a><\/li>\n
- Pierre-Sylvain Mar\u00e9chal<\/a><\/li>\n
- Joseph-Louis Lagrange, comte de l\u2019Empire<\/a><\/li>\n
- Gaspard Monge, count de P\u00e9luse<\/a><\/li>\n<\/ul>\n
Books on Display<\/h2>\n\n- [Cours de mathe\u0301matiques a\u0300 l’usage de l’E\u0301cole centrale des quatre-nations] \/ par S.-F. Lacroix. v.1 (Math 510 L112C)<\/li>\n
- Application de l’analyse a\u0300 la ge\u0301ome\u0301trie, par G. Monge. (Math 516.3 M74A)<\/li>\n
- Journal. v.1(1795-1796) (Math [non-circulating] 505 JO)<\/li>\n
- Kalenderarithmetik \/ Heinz Bachmann. (Math 529.7 B124K)<\/li>\n
- The\u0301orie des fonctions analytiques : contenant les principes du calcul diffe\u0301rentiel, de\u0301gage\u0301s de toute conside\u0301ration d’infiniment petits, d’e\u0301vanouissants, de limites et de fluxions, et re\u0301duits a\u0300 l’analyse alge\u0301brique des quantite\u0301s finies (Math 515.9 L13T1847)<\/li>\n
- Untersuchungen zur Geschichte der tibetischen Kalenderrechnung \/ von Dieter Schuh. (Math 529.3 SCH79U)<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":49,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[2],"tags":[],"class_list":["post-370","post","type-post","status-publish","format-standard","hentry","category-exhibits"],"acf":[],"_links":{"self":[{"href":"https:\/\/wordpress.library.illinois.edu\/mtx\/wp-json\/wp\/v2\/posts\/370","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wordpress.library.illinois.edu\/mtx\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wordpress.library.illinois.edu\/mtx\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wordpress.library.illinois.edu\/mtx\/wp-json\/wp\/v2\/users\/49"}],"replies":[{"embeddable":true,"href":"https:\/\/wordpress.library.illinois.edu\/mtx\/wp-json\/wp\/v2\/comments?post=370"}],"version-history":[{"count":11,"href":"https:\/\/wordpress.library.illinois.edu\/mtx\/wp-json\/wp\/v2\/posts\/370\/revisions"}],"predecessor-version":[{"id":3959,"href":"https:\/\/wordpress.library.illinois.edu\/mtx\/wp-json\/wp\/v2\/posts\/370\/revisions\/3959"}],"wp:attachment":[{"href":"https:\/\/wordpress.library.illinois.edu\/mtx\/wp-json\/wp\/v2\/media?parent=370"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wordpress.library.illinois.edu\/mtx\/wp-json\/wp\/v2\/categories?post=370"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wordpress.library.illinois.edu\/mtx\/wp-json\/wp\/v2\/tags?post=370"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
<\/a>\n\t\t\t<\/div>\n\t\t\t\tBy Tresca, Salvatore (Graveur) \u2013 Lafitte, Louis (Dessinateur du mod\u00e8le)
[Public domain], via Wikimedia Commons\n\t\t\t\t<\/figcaption><\/figure>
<\/a>\n\t\t\t<\/div>\n\t\t\t\tBy Tresca, Salvatore (Graveur) \u2013 Lafitte, Louis (Dessinateur du mod\u00e8le)
[Public domain], via Wikimedia Commons\n\t\t\t\t<\/figcaption><\/figure>
<\/a>\n\t\t\t<\/div>\n\t\t\t\tBy Tresca, Salvatore (Graveur) \u2013 Lafitte, Louis (Dessinateur du mod\u00e8le)
[Public domain], via Wikimedia Commons\n\t\t\t\t<\/figcaption><\/figure>\n\t\t<\/div>\n\n
Winter<\/h3>\n\n\t\t\t\n\t\t\t\t<\/a>\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\tNiv\u00f4se (“Snow”)
By Tresca, Salvatore (Graveur) \u2013 Lafitte, Louis (Dessinateur du mod\u00e8le)
[Public domain], via Wikimedia Commons\n\t\t\t\t<\/figcaption><\/figure>\n\t\t\t\n\t\t\t\t<\/a>\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\tPluvi\u00f4se (“Rain”)
By Tresca, Salvatore (Graveur) \u2013 Lafitte, Louis (Dessinateur du mod\u00e8le)
[Public domain], via Wikimedia Commons\n\t\t\t\t<\/figcaption><\/figure>\n\t\t\t\n\t\t\t\t<\/a>\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\tVent\u00f4se (“Wind”)
By Tresca, Salvatore (Graveur) \u2013 Lafitte, Louis (Dessinateur du mod\u00e8le)
[Public domain], via Wikimedia Commons\n\t\t\t\t<\/figcaption><\/figure>\n\t\t<\/div>\n\nHistory<\/h2>\n
During the height of the French Revolution in 1793, France’s National Convention set out to replace the widely used Gregorian calendar with a new version divorced from any Christian associations and instead grounded in logic and reason. The result was the French Republican calendar.<\/p>\n
The design drew inspiration from a similar calendar proposed by French poet and playwright Pierre-Sylvain Mare\u0301chal in 1788. All 12 months received new names and the beginning and ending days of each month were changed to better align with the various equinoxes and the changing seasons. The calendar was implemented on October 5, 1793 and received and official, backdated starting day of 1 Vende\u0301miaire, year I (September 22, 1792 according to the Gregorian calendar).<\/p>\n
France soon became disenchanted with its new calendar through. Transposing dates between the French Republican calendar and the Gregorian calendar complicated communications with other countries and France formally switched back to the Gregorian calendar on January 1, 1806.<\/p>\n
When it came to the technical design of the French Republican calendar, the National Committee enlisted the help of two prominent mathematicians. Joseph-Louis Lagrange (seminal figure in number theory and analytic and celestial mechanics) and Gaspard Monge (inventor of descriptive geometry) collaborated to create the new system.<\/p>\n
The mathematicians’ final design consisted of 12 months of 30 days each. Every month consisted of three, 10-day de\u0301cades<\/em> instead of weeks. The final five days of each 365-day year were set aside for vacations and festivals before the autumnal equinox. Leap days could be added as one more festival day, signifying the end of another four-year period know as Franciade<\/em>.<\/p>\nHistorical information about the calendar came from the following:<\/p>\n
\n- French republican calendar<\/a><\/li>\n
- Calendar reform since the mid-18th century, Britannica Academic<\/a><\/li>\n
- Pierre-Sylvain Mar\u00e9chal<\/a><\/li>\n
- Joseph-Louis Lagrange, comte de l\u2019Empire<\/a><\/li>\n
- Gaspard Monge, count de P\u00e9luse<\/a><\/li>\n<\/ul>\n
Books on Display<\/h2>\n\n- [Cours de mathe\u0301matiques a\u0300 l’usage de l’E\u0301cole centrale des quatre-nations] \/ par S.-F. Lacroix. v.1 (Math 510 L112C)<\/li>\n
- Application de l’analyse a\u0300 la ge\u0301ome\u0301trie, par G. Monge. (Math 516.3 M74A)<\/li>\n
- Journal. v.1(1795-1796) (Math [non-circulating] 505 JO)<\/li>\n
- Kalenderarithmetik \/ Heinz Bachmann. (Math 529.7 B124K)<\/li>\n
- The\u0301orie des fonctions analytiques : contenant les principes du calcul diffe\u0301rentiel, de\u0301gage\u0301s de toute conside\u0301ration d’infiniment petits, d’e\u0301vanouissants, de limites et de fluxions, et re\u0301duits a\u0300 l’analyse alge\u0301brique des quantite\u0301s finies (Math 515.9 L13T1847)<\/li>\n
- Untersuchungen zur Geschichte der tibetischen Kalenderrechnung \/ von Dieter Schuh. (Math 529.3 SCH79U)<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":49,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[2],"tags":[],"class_list":["post-370","post","type-post","status-publish","format-standard","hentry","category-exhibits"],"acf":[],"_links":{"self":[{"href":"https:\/\/wordpress.library.illinois.edu\/mtx\/wp-json\/wp\/v2\/posts\/370","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wordpress.library.illinois.edu\/mtx\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wordpress.library.illinois.edu\/mtx\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wordpress.library.illinois.edu\/mtx\/wp-json\/wp\/v2\/users\/49"}],"replies":[{"embeddable":true,"href":"https:\/\/wordpress.library.illinois.edu\/mtx\/wp-json\/wp\/v2\/comments?post=370"}],"version-history":[{"count":11,"href":"https:\/\/wordpress.library.illinois.edu\/mtx\/wp-json\/wp\/v2\/posts\/370\/revisions"}],"predecessor-version":[{"id":3959,"href":"https:\/\/wordpress.library.illinois.edu\/mtx\/wp-json\/wp\/v2\/posts\/370\/revisions\/3959"}],"wp:attachment":[{"href":"https:\/\/wordpress.library.illinois.edu\/mtx\/wp-json\/wp\/v2\/media?parent=370"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wordpress.library.illinois.edu\/mtx\/wp-json\/wp\/v2\/categories?post=370"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wordpress.library.illinois.edu\/mtx\/wp-json\/wp\/v2\/tags?post=370"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
<\/a>\n\t\t\t<\/div>\n\t\t\t\tBy Tresca, Salvatore (Graveur) \u2013 Lafitte, Louis (Dessinateur du mod\u00e8le)
[Public domain], via Wikimedia Commons\n\t\t\t\t<\/figcaption><\/figure>
<\/a>\n\t\t\t<\/div>\n\t\t\t\tBy Tresca, Salvatore (Graveur) \u2013 Lafitte, Louis (Dessinateur du mod\u00e8le)
[Public domain], via Wikimedia Commons\n\t\t\t\t<\/figcaption><\/figure>
<\/a>\n\t\t\t<\/div>\n\t\t\t\tBy Tresca, Salvatore (Graveur) \u2013 Lafitte, Louis (Dessinateur du mod\u00e8le)
[Public domain], via Wikimedia Commons\n\t\t\t\t<\/figcaption><\/figure>\n\t\t<\/div>\n\n
History<\/h2>\n
During the height of the French Revolution in 1793, France’s National Convention set out to replace the widely used Gregorian calendar with a new version divorced from any Christian associations and instead grounded in logic and reason. The result was the French Republican calendar.<\/p>\n
The design drew inspiration from a similar calendar proposed by French poet and playwright Pierre-Sylvain Mare\u0301chal in 1788. All 12 months received new names and the beginning and ending days of each month were changed to better align with the various equinoxes and the changing seasons. The calendar was implemented on October 5, 1793 and received and official, backdated starting day of 1 Vende\u0301miaire, year I (September 22, 1792 according to the Gregorian calendar).<\/p>\n
France soon became disenchanted with its new calendar through. Transposing dates between the French Republican calendar and the Gregorian calendar complicated communications with other countries and France formally switched back to the Gregorian calendar on January 1, 1806.<\/p>\n
When it came to the technical design of the French Republican calendar, the National Committee enlisted the help of two prominent mathematicians. Joseph-Louis Lagrange (seminal figure in number theory and analytic and celestial mechanics) and Gaspard Monge (inventor of descriptive geometry) collaborated to create the new system.<\/p>\n
The mathematicians’ final design consisted of 12 months of 30 days each. Every month consisted of three, 10-day de\u0301cades<\/em> instead of weeks. The final five days of each 365-day year were set aside for vacations and festivals before the autumnal equinox. Leap days could be added as one more festival day, signifying the end of another four-year period know as Franciade<\/em>.<\/p>\n Historical information about the calendar came from the following:<\/p>\n\n
Books on Display<\/h2>\n
\n