List of National and Regional Holidays of Tamil Nadu in 2021:
| Date | Day | Holiday |
|---|---|---|
| 2021-01-01 | Friday | New Year’s Day |
| 2021-01-14 | Thursday | Pongal |
| 2021-01-15 | Friday | Thiruvalluvar Day |
| 2021-01-16 | Saturday | Uzhavar Thirunal |
| 2021-01-26 | Tuesday | Republic Day |
| 2021-04-02 | Friday | Good Friday |
| 2021-04-13 | Tuesday | Telugu New Year’s Day |
| 2021-04-14 | Wednesday | Tamil New year’s Day and Dr. B.R. Ambedkar’s Birthday |
| 2021-04-25 | Sunday | Mahavir Jayanthi |
| 2021-05-01 | Saturday | May Day |
| 2021-05-14 | Friday | Ramzan (idu’l Fitr) |
| 2021-07-21 | Wednesday | Bakrid (Idul Azha) |
| 2021-08-15 | Sunday | Independence Day |
| 2021-08-20 | Friday | Muharram |
| 2021-08-30 | Monday | Krishna Jayanthi |
| 2021-09-10 | Friday | Vinayakar Chathurthi |
| 2021-10-02 | Saturday | Ganthi Jayanthi |
| 2021-10-14 | Thursday | Ayutha Pooja |
| 2021-10-15 | Friday | Vijaya Dasami |
| 2021-10-19 | Tuesday | Milad-un-Nabi |
| 2021-11-04 | Thursday | Deepavali |
| 2021-12-25 | Saturday | Christmas |
2021 Tamil Nadu Public and Government Holidays
