This is 2021 holidays of Sri Lanka.
| Date | Day | Holiday |
| 14 January | Thursday | Tamil Thai Pongal Day |
| 28 January | Thursday | Duruthu Full Moon Poya Day |
| 4 February | Thursday | National Day |
| 26 February | Friday | Navam Full Moon Poya Day |
| 11 March | Thursday | Mahasivarathri Day |
| 28 March | Sunday | Madin Full Moon Poya Day |
| 2 April | Friday | Good Friday |
| 13 April | Tuesday | Day prior to Sinhala & Tamil New Year Day |
| 14 April | Wednesday | Sinhala & Tamil New Year Day |
| 26 April | Monday | Bak Full Moon Poya Day |
| 1 May | Saturday | May Day |
| 14 May | Friday | Id Ul-Fitr |
| 26 May | Wednesday | Vesak Full Moon Poya Day |
| 27 May | Thursday | Day following Vesak Full Moon Poya Day |
| 24 June | Thursday | Poson Full Moon Poya Day |
| 21 July | Wednesday | Id Ul-Alha |
| 23 July | Friday | Esala Full Moon Poya Day |
| 22 August | Sunday | Nikini Full Moon Poya Day |
| 20 September | Monday | Binara Full Moon Poya Day |
| 19 October | Tuesday | Milad un-Nabi |
| 20 October | Wednesday | Vap Full Moon Poya Day |
| 4 November | Thursday | Deepavali |
| 18 November | Thursday | Ill Full Moon Poya Day |
| 18 December | Saturday | Unduvap Full Moon Poya Day |
| 25 December | Saturday | Christmas Day |