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Gregory's calendar reform modified the Julian rule, to reduce the average length of the calendar year from 365.25 days to 365.2425 days and thus corrected the Julian calendar's drift against the solar year: the Gregorian calendar gains just 0.1 day over 400 years. For any given event during the years from 1901 through 2099, its date according ...
The Julian date (JD) of any instant is the Julian day number plus the fraction of a day since the preceding noon in Universal Time. Julian dates are expressed as a Julian day number with a decimal fraction added. [8] For example, the Julian Date for 00:30:00.0 UT January 1, 2013, is 2 456 293.520 833. [9]
Return to the Julian calendar [12] [21] Latvia Courland: 1915 11 May 25 May 13 Latvia Livland: 1915 22 Aug 5 Sept 13 Lithuania: Grand Duchy of Lithuania: 1585 21 Dec 1 Jan (1586) 10 [23] Lithuania Lithuania Governorate: 1800 11 Jan 1 Jan -11 Return to the Julian calendar: Lithuania Kovno and Vilna Governorates: 1915 11 May 25 May 13 [24 ...
No guidance is provided about conversion of dates before March 5, -500, or after February 29, 2100 (both being Julian dates). For unlisted dates, find the date in the table closest to, but earlier than, the date to be converted. Be sure to use the correct column. If converting from Julian to Gregorian, add the
The corresponding date in the Gregorian calendar is 9 February 1649, the date by which his contemporaries in some parts of continental Europe would have recorded his execution. The O.S./N.S. designation is particularly relevant for dates which fall between the start of the "historical year" (1 January) and the legal start date, where different.
The Islamic calendar is based on the prohibition of intercalation by Muhammad, in Islamic tradition dated to a sermon held on 9 Dhu al-Hijjah AH 10 (Julian date: 6 March 632). This resulted in an observationally based lunar calendar shifting relative to the seasons of the solar year.
The result is valid for all proleptic Julian calendar dates starting on March 1, 4801 BC at noon. ... Note that Julian days begin at noon (hour = 12) and thus hours 0 ...
Old Style (O.S.) was used for the Julian calendar and for years not beginning on 1 January. New Style (N.S.) was used for the Gregorian calendar and for Julian calendar years beginning on 1 January. Many countries switched to using 1 January as the start of the numbered year at the same time as they switched from the Julian calendar to the ...