The Islamic calendar, also known as the Hijri calendar, holds great significance for Muslims worldwide. It is a lunar calendar consisting of 12 months based on the cycles of the moon, making it shorter than the Gregorian calendar. The Islamic calendar begins with the migration of the Prophet Muhammad (PBUH) from Mecca to Medina, known as the Hijra, in the year 622 AD.

The Hijri calendar is used to determine the dates of Islamic events and religious observances, such as Ramadan, Eid al-Fitr, and Hajj. It reminds Muslims of key historical events in Islam and helps them organize their religious obligations and celebrations according to the lunar cycles. The Hijri calendar also serves as a way for Muslims to mark time and connect with their faith on a daily basis.