Martyrdom of Hasan al-Askari is a public holiday in Iran, known locally as شهادت امام حسن عسکری علیه السلام.
In 2026 it falls on Friday 21 August; in 2027 on Wednesday 11 August.
It follows the lunar calendar: the dates shown are estimates and may shift by a day once the moon is sighted.
Dates, 2025 to 2028
| Year | Date | Weekday | Note |
|---|---|---|---|
| 2025 | 1 September | Monday long weekend | |
| 2026 | 21 August | Friday long weekend | |
| 2027 | 11 August | Wednesday | estimated date |
| 2028 | 31 July | Monday long weekend | estimated date |