Ashura

Ashura (Arabic: عَاشُورَاء, ʿĀshūrāʾ [ʕaːʃuːˈraːʔ]), also more formally as the Day of Ashura (Arabic: يوم عاشوراء, romanized: Yawm ʿĀshūrāʾ), is a day of commemoration in Islam. It occurs annually on the tenth of Muharram, the first month of the Islamic calendar.

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

Ashura falls on Tuesday, June 15, 2027. The countdown above updates live, so you always see exactly how many days, hours, and minutes are left.