Origin of the Islamic Calendar: Understanding the Hijri Year

The Islamic calendar, also known as the Hijri calendar, is a lunar calendar comprising 12 months. Its cycle is based on the observation of the moon, with each month beginning and ending with the sighting of a new crescent moon. This lunar-based system means the Islamic year is shorter than the solar Gregorian calendar, causing Islamic holidays and observances to shift throughout the seasons over time. The calendar's inception is attributed to the Hijra, the migration of Prophet Muhammad from Mecca to Medina in 622 CE. This event marks the beginning of the Islamic era. The precise origin and standardization of the calendar involved significant historical developments following the Prophet's migration.

Understanding the origin of the Islamic calendar is crucial for comprehending Islamic history, religious observances, and cultural practices tied to its lunar cycle.