2012 Event A missing piece of the Mayan calendar is discovered, proving the Maya didn't believe 2012 would be the end of the world 1979 Birthday Sean Fox, actor, 3 Ninjas Kick Back, Calendar Girl 1974 Death Edna Best, actress (Key, Calendar, Escape), dies at 74 1970 Event Afro-American Historical Calendar Series Established 1970 Event Revised calendar for Western (RC) Church goes into effect 1957 Event Republic of India adopts Saka calendar along with Gregorian 1941 Event Archer's "Christian Calendar and Gregorian Reform" published 1940 Event U.S.S.R. returns to Gregorian calendar 1940 Event End of U.S.S.R. experimental calendar; Gregorian readopted 6/27 1931 Event 1st International Conference on Calendar Reform 1925 Event Turkey adopts Gregorian calendar 1925 Event Iran adopts Khorshidi solar Hijrah calendar 1923 Event U.S.S.R. adopts experimental calendar, with 5-day "weeks" 1923 Event U.S.S.R. adopts experimental calendar 1920 Event Last day of Julian civil calendar (in parts of Bulgaria) 1920 Event Greece adopts the Gregorian calendar 1920 Event Last day of Julian civil calendar in Greece 1918 Event Estonia, Latvia and Lithuania adopt Gregorian calendar 1918 Event U.S.S.R. adopts New Style (Gregorian) calendar (originally Feb 1) 1918 Event Finland and U.S.S.R. adopts New Style (Gregorian) calendar 1918 Event Last day of the Julian calendar in Finland 1912 Event China adopts Gregorian calendar 1900 Birthday Edna Best, born in Hove, England, actress starred in Key, Calendar, Escape, Intermezzo 1893 Event Japan adopts the Gregorian calendar 1880 Birthday Elisabeth Achelis, creator, World Calendar 1867 Event Alaska adopts Gregorian calendar, crosses International date line 1867 Event Last day of Julian calendar in Alaska 1844 Event Origin of Baha'i Era-Baha'i calendar starts here (Baha 1, 1) 1805 Event End of French Republican calendar; France returns to Gregorianism 1793 Event Republican calendar replaces Gregorian calendar in France 1793 Birthday John Clare, Northamptonshire peasant poet, Shepard's Calendar 1790 Event Aztec calendar stone discovered in Mexico City 1752 Event This day never happened nor next 10 as England adopts Gregorian Calendar. People riot thinking the government stole 11 days of their lives 1752 Event Last day of Julian calendar in Britain, British colonies 1701 Event Drenthe adopts Gregorian calendar (yesterday is 4/29/1701) 1701 Event Drenthe Netherlands adopts Gregorian calendar, tomorrow is May 12, 1701 1701 Event Frisia and Groningen begin use of Gregorian calendar 1701 Event Parts of Netherlands adopt Gregorian calendar 1700 Event Frisia/Groningen adopt Gregorian calendar, tomorrow is 1/12/1701 1700 Event Utrecht/Overijssel/Buren/Leerdam/Ijsselstein adopt Gregorian calendar 1700 Event Utrecht/Overijssel/Buren/Leerdam/IJsselstein go on Gregoria calendar 1700 Event Gelderland accepts Gregorian calendar; yesterday is June 30, 1700 1700 Event Gelderland goes on Gregorian calendar (tomorrow is 12/7/1700) 1700 Event Last day of Julian calendar in Denmark 1700 Event Protestant West-Europe (except England) begin using Gregorian calendar 1700 Event Russia replaces Byzantines with Julian calendar 1694 Birthday Lord Chesterfield, letter writer; introduced Gregorian calendar, 1752 1612 Death Christopher Clavius, calendar reformer, dies (birth date unknown) 1584 Event Parts of Switzerland adopt Gregorian calendar (& parts in 1812) 1584 Event Bohemia adopts Gregorian calendar 1584 Event Last day of the Julian calendar in Bohemia and Holy Roman empire 1583 Event Groningen Netherlands begins using Gregorian calendar 1583 Event Holland begins use of Gregorian calendar (yesterday was 1/1/1583) 1583 Event 1st day of the Gregorian calendar in Holland and Flanders 1582 Event Zealand/Brabant adopts Gregorian calendar, yesterday was Dec 14th 1582 Event Flanders adopts Gregorian calendar, tomorrow is Jan 1 1583 1582 Event Spanish Netherlands/Denmark/Norway adopt Gregorian calendar 1582 Event Zealand/Brabant Netherlands adopt Gregorian calendar, tomorrow is 12/25 1582 Event France begins use of Gregorian calendar 1582 Event Many Catholic countries switch to Gregorian calendar, skip 10 days 1582 Event Gregorian calendar introduced in Italy, other Catholic countries 1582 Event Pope Gregory XIII announces New Style (Gregorian) calendar 1502 Birthday Gregory XIII, Pope, introduced Gregorian calendar in 1582 1079 Event Iran adopts solar Hijrah calendar 990 Event Russia adopts Julian calendar 638 Event Start of Islamic calendar 597 Event England adopts Julian calendar 552 Event Origin of Armenian calendar 468 Death Pope Hilarius, calendar reformer, dies (birth date unknown)