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There are 22 public holidays in the state of Tamil Nadu, India in 2020. Four of them fall on Saturday and three of them fall on Sunday.
The following is the list of public holidays in Tamil Nadu 2020.
| Holiday | Date | Weekday | Note |
|---|---|---|---|
| New Year's Day | Jan 1, 2020 | Wednesday | Regional Holiday |
| Pongal | Jan 15, 2020 | Wednesday | Regional Holiday |
| Thiruvalluvar Day | Jan 16, 2020 | Thursday | Regional Holiday |
| Uzhavar Thirunal | Jan 17, 2020 | Friday | Regional Holiday |
| Republic Day | Jan 26, 2020 | Sunday | Public Holiday |
| Telugu New Year's Day | Mar 25, 2020 | Wednesday | Regional Holiday |
| Annual closing of Accounts | Apr 1, 2020 | Wednesday | Bank Holiday |
| Mahavir Jayanthi | Apr 6, 2020 | Monday | Regional Holiday |
| Good Friday | Apr 10, 2020 | Friday | Regional Holiday |
| Tamil New year's Day Dr. B.R. Ambedkar's Birthday | Apr 14, 2020 | Tuesday | Regional Holiday |
| May Day | May 1, 2020 | Friday | Regional Holiday |
| Ramzan (idu'l Fitr) | May 25, 2020 | Monday | Regional Holiday |
| Eid al-Adha | Aug 1, 2020 | Saturday | Regional Holiday |
| Krishna Jayanthi | Aug 11, 2020 | Tuesday | Regional Holiday |
| Independence Day | Aug 15, 2020 | Saturday | Public Holiday |
| Vinayaka Chaturthi | Aug 22, 2020 | Saturday | Regional Holiday |
| Muharram | Aug 30, 2020 | Sunday | Regional Holiday |
| Gandhi Jayanti | Oct 2, 2020 | Friday | Public Holiday |
| Ayudha Puja | Oct 25, 2020 | Sunday | Regional Holiday |
| Vijaya Dasami | Oct 26, 2020 | Monday | Regional Holiday |
| Milad-un-Nabi | Oct 30, 2020 | Friday | Regional Holiday |
| Deepawali | Nov 14, 2020 | Saturday | Regional Holiday |
| Christmas Day | Dec 25, 2020 | Friday | Regional Holiday |
Please also check working days in Tamil Nadu, India in 2020.