Public holidays in 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 Islamic calendar for Islamic holidays.
The surfeit of public holidays has been a subject of concern for almost 30 years. A substantial number of unofficial holidays are added each year to the national holidays that further aggravate the situation.
Iran has the most public holidays in the world with around 25 holidays. The holidays in Iran may differ regarding the Arabic Calendar.
| Date | Event | Local Name | Remarks |
| Farvardin 1-4 | Nowruz | نوروز - Nowruz | Persian New Year |
| Farvardin 12 | Islamic Republic Day | روز جمهوری اسلامی - Ruz e Jomhuri ye Eslāmi | |
| Farvardin 13 | Sizdah Bedar | سیزده بدر | Commonly pronounced and spelled Sizdah Bedar |
| Khordad 14 | Death of Khomeini | رحلت آیت الله خمینی - Rehlat e Xomeyni | |
| Khordad 15 | Revolt of Khordad 15 | قیام ۱۵ خرداد - Qiām e Pānzdah e Xordād | |
| Bahman 22 | Anniversary of Islamic Revolution | انقلاب اسلامی پنجاه و هفت - Enqelāb e Eslāmi | Officially the Islamic Revolution |
| Esfand 29 | Nationalization of the Iranian oil industry | ملی شدن صنعت نفت - Melli Šodan e Saneat e Naft |
| Date | Event |
| Muharram 9 | Tasua |
| Muharram 10 | Ashura |
| Safar 20 | Arbaeen |
| Safar 28 | Demise of Prophet Muhammad and Imam Hassan |
| Safar 29 or 30 | Martyrdom of Imam Reza |
| Rabi'-ul-Awwal 17 | Birth of Muhammad and Imam Jafar |
| Jamaad-ath-Thaanee 3 | Martyrdom of Fatima |
| Rajab 13 | Birth of Imam Ali |
| Rajab 27 | Mission of Muhammad |
| Sha'aban 15 | Birth of Imam Mahdi |
| Ramadhan 21 | Martyrdom of Imam Ali |
| Shawwal 1 | Eid ul-Fitr |
| Shawwal 25 | Martyrdom of Imam Jafar |
| Dh-ul-Hajja 10 | Eid ul-Adha |
| Dh-ul-Hajja 18 | Eid al-Ghadeer |