| 4 Feb, 2023 (Sat) | Birthday of Imam Ali and Father's Day (Tentative Date) | National holiday |
| 11 Feb, 2023 (Sat) | Revolution Day | National holiday |
| 18 Feb, 2023 (Sat) | Prophet's Ascension | National holiday |
| 8 Mar, 2023 (Wed) | Imam Mahdi's birthday (Tentative Date) | National holiday |
| 20 Mar, 2023 (Mon) | Oil Nationalization Day | National holiday |
| 21 Mar, 2023 (Tue) | Norooz (Persian New Year) | National holiday |
| 21 Mar, 2023 (Tue) | March Equinox | Season |
| 22 Mar, 2023 (Wed) | Norooz Holiday | National holiday |
| 23 Mar, 2023 (Thu) | Norooz Holiday | National holiday |
| 23 Mar, 2023 (Thu) | Ramadan Start | Observance |
| 24 Mar, 2023 (Fri) | Norooz Holiday | National holiday |
| 1 Apr, 2023 (Sat) | Islamic Republic Day | National holiday |
| 2 Apr, 2023 (Sun) | Nature Day | National holiday |
| 12 Apr, 2023 (Wed) | Martyrdom of Imam Ali (Tentative Date) | National holiday |
| 22 Apr, 2023 (Sat) | Eid-e-Fetr (End of Ramadan) | National holiday |
| 23 Apr, 2023 (Sun) | Eid-e-Fetr (Additional Holiday) | National holiday |
| 15 May, 2023 (Mon) | Martyrdom of Imam Sadeq | National holiday |
| 4 Jun, 2023 (Sun) | Demise of Imam Khomeini | National holiday |
| 5 Jun, 2023 (Mon) | Khordad National Uprising | National holiday |
| 21 Jun, 2023 (Wed) | June Solstice | Season |
| 29 Jun, 2023 (Thu) | Eid-e-Ghorban (Feast of Sacrifice) | National holiday |
| 7 Jul, 2023 (Fri) | Eid-e-Ghadir (Tentative Date) | National holiday |
| 27 Jul, 2023 (Thu) | Tassoua | National holiday |
| 28 Jul, 2023 (Fri) | Ashura | National holiday |
| 2 Aug, 2023 (Wed) | Public Holiday for Extreme Weather | National holiday |
| 3 Aug, 2023 (Thu) | Public Holiday for Extreme Weather | National holiday |
| 6 Sep, 2023 (Wed) | Arbaeen (Tentative Date) | National holiday |
| 14 Sep, 2023 (Thu) | Demise of Prophet Muhammad and Martyrdom of Imam Hassan (Tentative Date) | National holiday |
| 15 Sep, 2023 (Fri) | Martyrdom of Imam Reza (Tentative Date) | National holiday |
| 23 Sep, 2023 (Sat) | September Equinox | Season |
| 24 Sep, 2023 (Sun) | Martyrdom of Imam Hasan al-Askari (Tentative Date) | National holiday |
| 3 Oct, 2023 (Tue) | Birthday of Prophet Muhammad and Imam Sadeq (Tentative Date) | National holiday |
| 17 Dec, 2023 (Sun) | Martyrdom of Hazrat Fatima (Tentative Date) | National holiday |
| 22 Dec, 2023 (Fri) | December Solstice | Season |
