Public holidays in Iran
Iran uses three official calendar systems, including the Solar Hijri calendar as the main and national calendar, the Gregorian calendar for international events and Christian holidays, and the Lunar Hijri calendar for Islamic holidays.
In 2008, the Iranian government's English-language newspaper Iran Daily wrote that " problem of too many annual public holidays has perpetually been a subject of concern," pointing out that the government would often declare "unofficial holidays to allow extended weekends" around the national holidays. "f official and unofficial holidays are added to weekends, almost half the year the country is holidaying! The serious issue of so many holidays should not be tolerated "
Iran is one of the countries with the most public holidays in the world, with 28 holidays. Many holidays' exact dates are determined by the Islamic calendar, and therefore their Gregorian dates vary from year to year.
Events
| Date | Event |
| Muharram 9 | Tasua |
| Muharram 10 | Ashura |
| Safar 20 | Arbaeen |
| Safar 28 | Death of Muhammad and Hasan ibn Ali |
| Safar 29 or 30 | Death of Ali al-Rida |
| Rabi'-ul-Awwal 8 | Death of Hasan al-Askari |
| Rabi'-ul-Awwal 17 | Birth of Muhammad and Ja'far al-Sadiq |
| Jamaad-ath-Thaanee 3 | Death of Fatima |
| Rajab 13 | Birth of Ali |
| Rajab 27 | Mission of Muhammad |
| Sha'aban 15 | Birth of Mahdi |
| Ramadhan 21 | Death of Ali |
| Shawwal 1 | Eid ul-Fitr |
| Shawwal 2 | Eid ul-Fitr |
| Shawwal 25 | Death of Ja'far al-Sadiq |
| Dh-ul-Hajja 10 | Eid ul-Adha |
| Dh-ul-Hajja 18 | Eid al-Ghadeer |