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The Islamic calendar, Muslim calendar or Hijri calendar (AH)〔(アラビア語:التقويم الهجري) ''at-taqwīm al-hijrī''〕〔(Hijra Calendar )〕 is a lunar calendar consisting of 12 months in a year of 354 days. It is used to date events in many Muslim countries (concurrently with the Gregorian calendar), and used by Muslims everywhere to determine the proper days on which to observe the annual fasting, to attend ''Hajj'', and to celebrate other Islamic holidays and festivals. The first year was the Islamic year beginning in AD 622 during which the emigration of Muhammad from Mecca to Medina, known as the Hijra, occurred. Each numbered year is designated either "H" for ''Hijra'' or "AH" for the Latin ''Anno Hegirae'' ("in the year of the Hijra"); hence, Muslims typically call their calendar the Hijri calendar. The current Islamic year is 1437 AH. In the Gregorian calendar, 1437 AH runs from approximately 14 October 2015 to 2 October 2016.〔The exact dates depend on which variant of the Islamic calendar is followed.〕 == Months == Four of the twelve Hijri months are considered sacred: Rajab (7), and the three consecutive months of Dhu al-Qa‘dah (11), Dhu al-Hijjah (12) and Muharram (1).〔(Sahih Bukhari 004.054.419 )〕 Because the lunar calendar lags behind the solar calendar by about ten days every year, months of the Islamic calendar fall in different parts of the Gregorian calendar each year. The cycle repeats every 33 years. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Islamic calendar」の詳細全文を読む スポンサード リンク
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