Hajj

Hajj (Arabic: حَجّ, romanized: Ḥajj [ħaddʒ]; also spelled Hadj or Haj) is an annual Islamic pilgrimage to Mecca, Saudi Arabia, the holiest city in Islam. Hajj is a one-time-required religious duty for all Muslims who are physically and financially capable of undertaking the journey and supporting their family during their absence from home.

Hajj is observed in Islam. The summary above comes from Wikipedia, where you can read about the history and traditions of this observance.

Hajj falls on Friday, May 14, 2027. The countdown above updates live, so you always see exactly how many days, hours, and minutes are left.