The Hijri year is usually ten days shorter than the Gregorian year.
The Hijri calendar is named for the Hijra (or Hegira), the Prophet Muhammad's flight from Mecca to Medina to escape persecution. These holidays move in the Western ( Gregorian) calendar year since the Islamic (or Hijri) calendar is a lunar calendar, instead of a solar calendar. Here are the dates of the most important Islamic holidays through 2030.
