fuzzyworld

when-am-i / files / src / data / calendars / revolutionary-france.json

revolutionary-france.json

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c571572f 2026-06-21 Pavel Safronov1{
2 "region": {
3 "name": "France (mainland)",
4 "geo": {
2f202e69 2026-06-23 Pavel Safronov5 "type": "MultiPolygon",
c571572f 2026-06-21 Pavel Safronov6 "coordinates": [
7 [
2f202e69 2026-06-23 Pavel Safronov8 [
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c571572f 2026-06-21 Pavel Safronov234 ]
235 ]
236 }
237 },
238 "eras": [
239 {
240 "name": "Pre-revolutionary era",
241 "start": null,
242 "end": "1792-09-22",
243 "calendar": "Gregorian",
244 "usedBy": "the Kingdom of France",
245 "description": "France used the Gregorian calendar (adopted by Catholic France in 1582, among the first countries to do so) until the Republican calendar replaced it.",
246 "sources": [
247 "https://en.wikipedia.org/wiki/Adoption_of_the_Gregorian_calendar",
248 "https://en.wikipedia.org/wiki/French_Republican_calendar"
249 ]
250 },
251 {
252 "name": "French Republican calendar",
253 "start": "1792-09-22",
254 "end": "1806-01-01",
255 "calendar": "French Republican calendar",
256 "usedBy": "the First French Republic",
257 "description": "Adopted by the National Convention on 24 October 1793 and applied retroactively to the establishment of the Republic on 22 September 1792 (epoch of An I). Twelve 30-day months grouped by season (Vendemiaire, Brumaire, Frimaire; Nivose, Pluviose, Ventose; Germinal, Floreal, Prairial; Messidor, Thermidor, Fructidor) plus five or six extra 'Sansculottides' days. The year was meant to begin at the Paris autumnal equinox, determined by observation rather than a fixed rule, so leap years (an extra sixth day) were irregular — only Years III, VII and XI were observed as leap years before Napoleon abolished the calendar effective 1 January 1806.",
258 "sources": [
259 "https://en.wikipedia.org/wiki/French_Republican_calendar"
260 ]
261 },
262 {
263 "name": "Paris Commune revival",
264 "start": "1871-05-06",
265 "end": "1871-05-24",
266 "calendar": "French Republican calendar",
267 "usedBy": "the Paris Commune",
268 "description": "The Republican calendar was briefly revived for some dates in the Journal officiel during the Paris Commune, 6-23 May 1871 (16 Floreal-3 Prairial, An LXXIX), continuing the original year count from 1792.",
269 "sources": [
270 "https://en.wikipedia.org/wiki/French_Republican_calendar",
271 "https://en.wikipedia.org/wiki/Paris_Commune"
272 ]
273 },
274 {
275 "name": "Post-revolutionary era",
276 "start": "1806-01-01",
277 "end": null,
278 "calendar": "Gregorian",
279 "usedBy": "France",
280 "description": "Napoleon restored the Gregorian calendar effective 1 January 1806, and France has used it since (alongside the brief 1871 Commune revival of the Republican calendar).",
281 "sources": [
282 "https://en.wikipedia.org/wiki/French_Republican_calendar"
283 ]
284 }
285 ]
2f202e69 2026-06-23 Pavel Safronov286}