Chapter 60 Section 2 Hijri

The Hijri calendar is the calendar used in the Arab world.Now all ethnic groups in China who believe in Islam use the Hijri calendar. The Islamic calendar includes two types: the solar calendar and the lunar calendar. The Islamic calendar promulgated in China is the lunar calendar.During the Yuan and Ming dynasties, the Muslim calendar was the only minority calendar promulgated by the imperial court in China. Since it had nothing to do with the solar cycle, it was mainly used for sacrifices and calendars.Because the Hui people have lived with the Han people for a long time, they still use the lunar calendar and the Gregorian calendar in their daily life.

The epoch of the Hijri calendar is set on Friday, July 16, 622 AD.There are 12 months in a year, 30 days in a single month, 29 days in a double month, and 354 days in an ordinary year.The Hijri calendar does not set a leap month but a leap day, and every leap year, the leap day is always arranged at the end of December.How to judge a normal year and a leap year?Divide the Hijri year by 30, and the remainder is 2, 5, 7, 10, 13, 16, 18, 21, 24, 26, 29 are leap years. The Hijri calendar regards the day when the new moon is seen as the first day of the first month, not the new moon, so the Wang day is not on the fifteenth day.Although there is a rigorous formula for calculating the moon's position in the Islamic calendar, its calendar distributes the big and small months evenly, and does not determine the first month according to the real synodic.

The Hijri calendar uses the week system to record days, which is the same as the Indian calendar. They are both passed down from ancient Babylon and ancient Greece, except that the Hijri calendar uses Friday as the day of worship.