Hari Raya or Eid al-Fitr
Hari Raya (Eid al-Fitr) rarely falls on the same date. "Hari Raya Haji (Aidil Adha) falls on 10 Zulhijjah, the 10th day of the 12th month of the Muslim calendar. The Muslim calendar, with the months alternating between 29 and 30 days, is 11 days shorter than the 365-day Gregorian calendar.
On this day, which is also known as the Festival of Sacrifice, Muslims worldwide sacrifice sheep, goats, cows or camels for the sake of religion and community. It is done in remembrance of the sacrifice undertaken by Prophet Ibrahim, who was ready to sacrifice his son Ismail, but a ram appeared in his place at the last moment.
Hari Raya Haji also marks the end of the pilgrimage to the holy city of Mecca. Muslims gather in Mecca to perform the pilgrimage, which is the fifth pillar of Islam."