The Islamic calendar, also known as the Hijri calendar, is a lunar calendar used by Muslims around the world. It determines the timing of Islamic rituals and holidays such as Ramadan, Eid al-Fitr, Eid al-Adha, and Hajj.
The Islamic calendar was introduced in 622 CE, the year of the Hijrah (migration of Prophet Muhammad from Mecca to Medina). It became the basis for dating events in Islamic history and remains in use today for religious purposes.
The Islamic calendar has 12 lunar months of 29 or 30 days each, totaling 354 or 355 days in a year. Since it is shorter than the solar year, Islamic months move about 11 days earlier each year in the Gregorian calendar.
Today's Islamic date is Rabīʿ ath-Thānī 3, 1447.
It is used to determine the dates of Islamic holidays and rituals, including Ramadan, Eid, and Hajj.
It is a purely lunar calendar with 12 months, shorter than the solar year, causing Islamic dates to shift earlier each year.