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  2. Tabular Islamic calendar - Wikipedia

    en.wikipedia.org/wiki/Tabular_Islamic_calendar

    Though less accurate than the tabular calendars based on a 30-year cycle, it was popular due to the fact that in each cycle the weekdays fall on the same calendar date. In other words, the 8-year cycle is exactly 405 weeks long, resulting in a mean of exactly 4.21875 weeks per month.

  3. Solar Hijri calendar - Wikipedia

    en.wikipedia.org/wiki/Solar_Hijri_calendar

    Correspondence of Solar Hijri and Gregorian calendars (Solar Hijri leap years are marked*) [15] 33-year cycle [16] Solar Hijri year Gregorian year Solar Hijri year Gregorian year 1: 1354* 21 March 1975 – 20 March 1976: 1387* 20 March 2008 – 20 March 2009 2: 1355: 21 March 1976 – 20 March 1977: 1388: 21 March 2009 – 20 March 2010 3: 1356

  4. Islamic calendar - Wikipedia

    en.wikipedia.org/wiki/Islamic_calendar

    Islamic calendar stamp issued at King Khalid International Airport on 10 Rajab 1428 AH (24 July 2007 CE). The Hijri calendar (Arabic: ٱلتَّقْوِيم ٱلْهِجْرِيّ, romanized: al-taqwīm al-hijrī), or Arabic calendar, also known in English as the Muslim calendar and Islamic calendar, is a lunar calendar consisting of 12 lunar months in a year of 354 or 355 days.

  5. Calendrical calculation - Wikipedia

    en.wikipedia.org/wiki/Calendrical_calculation

    The algorithm enables a computer to print calendar and diary pages for past or future sequences of any desired length from the reform of the calendar, which in England was 3/14 September 1752. The article Date of Easter gives algorithms for calculating the date of Easter. Combining the two enables the page headers to show any fixed or movable ...

  6. Iranian calendars - Wikipedia

    en.wikipedia.org/wiki/Iranian_calendars

    This change was reversed slightly more than two years later, on September 2, 1978 (11 Shahrivar 2537, which became 11 Shahrivar 1357), in the wake of civil unrest preceding the Iranian revolution, and the calendar reverted to Solar Hijri. [8] [9] Correspondence of Solar Hijri and Gregorian calendars (Solar Hijri leap years are marked *): [10]

  7. Calendar date - Wikipedia

    en.wikipedia.org/wiki/Calendar_date

    A calendar date is a reference to a particular day represented within a calendar system. The calendar date allows the specific day to be identified. The number of days between two dates may be calculated. For example, "25 January 2025" is ten days after "15 January 2025". The date of a particular event depends on the observed time zone.

  8. Hijri year - Wikipedia

    en.wikipedia.org/wiki/Hijri_year

    The Hijri year (Arabic: سنة هجرية, romanized: sanat hijriyya) or era (Arabic: التقويم الهجري, romanized: at-taqwīm al-hijrī) is the era used in the Islamic lunar calendar. It begins its count from the Islamic New Year in which Muhammad and his followers migrated from Mecca to Yathrib (now Medina ) in 622 CE.

  9. List of Islamic years - Wikipedia

    en.wikipedia.org/wiki/List_of_Islamic_years

    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.