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Gregorian calendar
The Gregorian calendar, also known as the Western calendar, or Christian calendar, is the internationally accepted civil calendar. It was introduced by Pope Gregory XIII, after whom the calendar was named, by a decree signed on 24 February 1582, a papal bull known by its opening words Inter gravissimas...
Timeline of Events
1582
2.24.1582
Pope Gregory XIII announces the Gregorian calendar.
10.4.1582
Pope Gregory XIII implements the Gregorian Calendar. In Italy, Poland, Portugal, and Spain, October 4 of this year is followed directly by October 15.
10.5.1582
Because of the implementation of the Gregorian calendar this day does not exist in this year in Italy, Poland, Portugal and Spain.
10.6.1582
Because of the implementation of the Gregorian calendar, this day is skipped in Italy, Poland, Portugal and Spain.
10.7.1582
Because of the implementation of the Gregorian calendar, this day is skipped in Italy, Poland, Portugal and Spain.
10.8.1582
Because of the implementation of the Gregorian calendar this day does not exist in this year in Italy, Poland, Portugal and Spain.
10.9.1582
Because of the implementation of the Gregorian calendar, this day does not exist in this year in Italy, Poland, Portugal and Spain.
10.11.1582
Because of the implementation of the Gregorian calendar, this day does not exist in this year in Italy, Poland, Portugal and Spain.
10.12.1582
Because of the implementation of the Gregorian calendar this day does not exist in this year in Italy, Poland, Portugal and Spain.
10.13.1582
Because of the implementation of the Gregorian calendar, this day does not exist in this year in Italy, Poland, Portugal and Spain.
10.14.1582
Because of the implementation of the Gregorian calendar this day does not exist in this year in Italy, Poland, Portugal and Spain.
10.15.1582
Pope Gregory XIII implements the Gregorian calendar. In Italy, Poland, Portugal, and Spain, October 4 of this year is followed directly by October 15.
1690
7.12.1690
Battle of the Boyne (Gregorian calendar) – The armies of William III defeat those of the former James II.
1700
3.1.1700
Sweden introduces its own Swedish calendar, in an attempt to gradually merge into the Gregorian calendar, reverts to the Julian calendar on this date in 1712, and introduces the Gregorian Calendar on this date in 1753.
3.1.1700
Sweden introduces its own Swedish calendar, in an attempt to gradually merge into the Gregorian calendar, reverts to the Julian calendar on this date in 1712, and introduces the Gregorian Calendar on this date in 1753.
1752
9.2.1752
Great Britain adopts the Gregorian calendar, nearly two centuries later than most of Western Europe.
9.14.1752
The British Empire adopts the Gregorian calendar, skipping eleven days (the previous day was September 2).
1753
2.17.1753
In Sweden February 17 is followed by March 1 as the country moves from the Julian calendar to the Gregorian calendar.
1873
1.1.1873
Japan begins using the Gregorian calendar.
1912
2.12.1912
The Republic of China adopts the Gregorian calendar.
1918
1.24.1918
The Gregorian calendar introduced in Russia by decree of the Council of People's Commissars effective from February 14(NS)
2.1.1918
Russia adopts the Gregorian Calendar.
2.14.1918
The Soviet Union adopts the Gregorian calendar (on 1 February according to the Julian calendar).
1925
12.26.1925
Turkey adopts the Gregorian Calendar.
1927
1.1.1927
Turkey adopts the Gregorian calendar: December 18, 1926 (Julian), is immediately followed by January 1, 1927 (Gregorian).