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March 1: March 11: 10 Year Julian date Gregorian date Difference 1582: October 4: October 14: 10 1582: October 5: October 15: 10 1582: October 6: October 16: 10 1700: February 18: February 28: 10 1700: February 19: March 1: 11 1700: February 28: March 10: 11 1700: February 29: March 11: 11 1700: March 1: March 12: 11 1800: February 17: February ...
The golden number of any Julian or Gregorian calendar year can be calculated by dividing the year by 19, taking the remainder, and adding 1. (In mathematics this can be expressed as (year number modulo 19) + 1.) For example, 2025 divided by 19 gives 106, remainder 11. Adding 1 to the remainder gives a golden number of 12.
The three mean tropical years in Babylonian sexagesimals as the excess over 365 days (the way they would have been extracted from the tables of mean longitude) were 0;14,33,9,57 (Alfonsine), 0;14,33,11,12 (Copernicus) and 0;14,33,9,24 (Reinhold). [j] In decimal notation, these are equal to 0.24254606, 0.24255185, and 0.24254352, respectively ...
A calendar date is a reference to a particular day, represented within a calendar system, enabling a specific day to be unambiguously identified. Simple math can be performed between dates; commonly, the number of days between two dates may be calculated, e.g., "25 February 2025" is ten days after "15 February 2025".
A calendar era is the period of time elapsed since one epoch of a calendar and, if it exists, before the next one. [1] For example, the current year is numbered 2025 in the Gregorian calendar, which numbers its years in the Western Christian era (the Coptic Orthodox and Ethiopian Orthodox churches have their own Christian eras).
The first day of Ramadan from 1357–1460 Hijri / 1938–2038 Gregorian [a] [1] Gregorian Hijri Gregorian Hijri Gregorian Hijri Gregorian Hijri 25 October 1938: 1357: 17 January 1964: 1383: 8 April 1989: 1409: 28 June 2014: 1435 15 October 1939: 1358: 6 January 1965: 1384: 28 March 1990: 1410: 18 June 2015: 1436 4 October 1940: 1359: 27 ...
This is a list of Hijri years (Latin: anno Hegirae or AH) with the corresponding common era years where applicable. For Hijri years since 1297 AH (1879/1881 CE), the Gregorian date of 1 Muharram, the first day of the year in the Islamic calendar, is given.
Given that the Islamic New Year does not begin January 1 and that a Hijri calendar year is about 11 days shorter than a Gregorian calendar year, [13] [c] there is no direct correspondence between years of the two eras. A given Hijri year will usually fall in two successive Gregorian years.