| 15 Jan, 2024 (Mon) | Tamil Thai Pongal Day | Public Holiday |
| 25 Jan, 2024 (Thu) | Duruthu Full Moon Poya Day | Public Holiday |
| 4 Feb, 2024 (Sun) | National Day | Public Holiday |
| 14 Feb, 2024 (Wed) | Valentine's Day | Observance |
| 23 Feb, 2024 (Fri) | Navam Full Moon Poya Day | Public Holiday |
| 8 Mar, 2024 (Fri) | Mahasivarathri Day | Public Holiday |
| 11 Mar, 2024 (Mon) | Ramadan Start (Tentative Date) | Observance |
| 20 Mar, 2024 (Wed) | March Equinox | Season |
| 24 Mar, 2024 (Sun) | Madin Full Moon Poya Day | Public Holiday |
| 25 Mar, 2024 (Mon) | Holi | Hindu Holiday |
| 29 Mar, 2024 (Fri) | Good Friday | Public Holiday |
| 31 Mar, 2024 (Sun) | Easter Sunday | Observance |
| 11 Apr, 2024 (Thu) | Eid al-Fitr (Tentative Date) | Public Holiday |
| 12 Apr, 2024 (Fri) | Sinhala and Tamil New Year's Eve | Public Holiday |
| 13 Apr, 2024 (Sat) | Sinhala and Tamil New Year's Day | Public Holiday |
| 23 Apr, 2024 (Tue) | Bak Full Moon Poya Day | Public Holiday |
| 1 May, 2024 (Wed) | May Day | Public Holiday |
| 12 May, 2024 (Sun) | Mother's Day | Observance |
| 23 May, 2024 (Thu) | Vesak Full Moon Poya Day | Public Holiday |
| 24 May, 2024 (Fri) | Day after Vesak Full Moon Poya Day | Public Holiday |
| 16 Jun, 2024 (Sun) | Father's Day | Observance |
| 17 Jun, 2024 (Mon) | Eid al-Adha (Tentative Date) | Public Holiday |
| 21 Jun, 2024 (Fri) | Poson Full Moon Poya Day | Public Holiday |
| 21 Jun, 2024 (Fri) | June Solstice | Season |
| 20 Jul, 2024 (Sat) | Esala Full Moon Poya Day | Public Holiday |
| 19 Aug, 2024 (Mon) | Raksha Bandhan | Hindu Holiday |
| 19 Aug, 2024 (Mon) | Nikini Full Moon Poya Day | Public Holiday |
| 7 Sep, 2024 (Sat) | Ganesh Chaturthi | Hindu Holiday |
| 16 Sep, 2024 (Mon) | Milad-Un-Nabi (Holy Prophet's Birthday) (Tentative Date) | Public Holiday |
| 17 Sep, 2024 (Tue) | Binara Full Moon Poya Day | Public Holiday |
| 22 Sep, 2024 (Sun) | September Equinox | Season |
| 13 Oct, 2024 (Sun) | Dussehra | Hindu Holiday |
| 17 Oct, 2024 (Thu) | Vap Full Moon Poya Day | Public Holiday |
| 31 Oct, 2024 (Thu) | Deepavali | Public Holiday |
| 15 Nov, 2024 (Fri) | Ill Full Moon Poya Day | Public Holiday |
| 14 Dec, 2024 (Sat) | Unduvap Full Moon Poya Day | Public Holiday |
| 21 Dec, 2024 (Sat) | December Solstice | Season |
| 24 Dec, 2024 (Tue) | Christmas Eve | Observance |
| 25 Dec, 2024 (Wed) | Christmas Day | Public Holiday |
