Dates in this table are determined by when the March Equinox falls. It will fall on March 20 from 2018 to
2023.
| Holiday date | Holiday name | Description | March equinox on March 19 | March Equinox on March 20 | March Equinox on March 21 |
|---|---|---|---|---|---|
| 1–4 Farvardin | Nowruz | New Year celebration of Spring. Public holiday in Iran. Note: Nowruz is the day after the March equinox. | March 20–24 | March 21–25 | March 22–26 |
| 12 Farvardin | Islamic Republic Day | Public holiday in Iran | March 31 | April 1 | April 2 |
| 13 Farvardin | Sizdah Bedar | Public holiday in Iran | April 1 | April 2 | April 3 |
| 3 Ordibehesht | Teacher's Day in Afghanistan | Not an official observance | April 22 | April 23 | April 24 |
| 12 Ordibehesht | Teacher's Day in Iran | The Islamic Republic government changed the original date to coincide with the assassination of Morteza Motahhari on 1 May 1979. | May 1 | May 2 | May 3 |
| 14 Khordad | Anniversary of the Death of Khomeini | Public holiday in Iran | June 3 | June 4 | June 5 |
| 15 Khordad | Anniversary Revolt of Khordad 15 | Public holiday in Iran | June 4 | June 5 | June 6 |
| 13 Tir | Tirgan | Mid-summer festival | July 3 | July 4 | July 5 |
| 7 Mordad | Amordadegan festival | 127 days after Nowruz | July 28 | July 29 | July 30 |
| 1 Shahrivar | National Doctors' Day in Iran | Avicenna's birthday | August 22 | August 23 | August 24 |
| 3 Shahrivar | Day of Combat Against British Colonialism | Public holiday in Iran | August 24 | August 25 | August 26 |
| 18 Shahrivar | Martyrs' Day (Afghanistan) | Celebrated as Haftai Shahid, or "Martyr Week". It is also observed as "Massoud Day" | September 8 | September 9 | September 10 |
| 31 Sharivar | Start of Sacred Defence Week | Also called Holy Defence Week. Commemoration of the 1980-1988 Iran-Iraq war. | September 21 | September 22 | September 23 |
| 10 Mehr | Mehregan | Zoroastrian festival celebrated in Autumn | October 1 | October 2 | October 3 |
| 7 Aban | Cyrus the Great Day | Unofficial holiday commemorating Cyrus the Great | October 28 | October 29 | October 30 |
| 16 Azar | Student Day (Iran) | Anniversary of the murder of three students of University of Tehran on December 7, 1953. | December 6 | December 7 | December 8 |
| 30 Azar | Yaldā Night | Winter festival celebrated on the December solstice. Also celebrated in Azerbaijan, Afghanistan, Kurdistan, Tajikistan, Turkey (by Kurds and Azeris), and in Pakistan (by Pashtuns and Balochs) | December 20 | December 21 | December 22 |
| 1 Dey | Khorram rooz | Ancient Persian considered this the first day of their New Year | December 21 | December 22 | December 23 |
| 10 Bahman | Sadeh | 50 days before Nowruz | January 29 | January 30 | January 31 |
| 22 Bahman | Anniversary of Islamic Revolution | Public holiday in Iran | February 10 | February 11 | February 12 |
| 5 Esfand | Sepandārmazgān | Described as "Persian Day of Love" | February 23 | February 24 | February 25 |
| 15 Esfand | Arbor Day in Iran | First day of the Natural Recyclable Resources Week | March 5 | March 6 | March 7 |
| Eve of the last Wednesday before Nowruz | Chaharshanbe Suri | Also observed in Azerbaijan, Afghanistan, Iraqi Kurdistan, Tajikistan and in Turkey (by Azeris and Kurds) | varies | varies | varies |
| 29 Esfand | Nationalization of Oil Industry | Public holiday in Iran | March 19 | March 20 | March 21 |