The Indian state of Tamil Nadu has 23 public holidays for staff working in government offices and banks.[1] They are declared under the Negotiable Instruments Act of 1881.[2] [3] Three of them are national holidays: Republic Day, Independence Day and Gandhi Jayanthi.[4] State-specific holidays include Pongal, Thiruvalluvar Day, and Tamil New Year.[5]
| New Years Day | 1 January | |
| Pongal | 15 January | |
| Thiruvalluvar Day | 16 January | |
| Uzhavar Thirunal | 17 January | |
| Republic Day | 26 January | |
| Telugu New Years Day | 23 March | |
| Annual closing of accounts for commercial & co-operative banks | 1 April | |
| Mahaveer Jayanthi | 6 April | |
| Good Friday | 10 April | |
| Tamil New Year Day, B R Ambedkar’s birthday | 14 April | |
| May Day (Labour's day) | 1 May | |
| Ramzan | 5 May | |
| Bakrid | 1 August | |
| Krishna Jayanthi | 11 August | |
| Independence day | 15 August | |
| Ganesh Chaturthi | 22 August | |
| Muharram | 30 August | |
| Gandhi Jayanthi (Mahatma Gandhi's birthday) | 2 October | |
| Ayutha Pooja | 14 October | |
| Vijayadasami | 15 October | |
| Milad-un-Nabi | 30 October | |
| Deepavali (Diwali) | 14 November | |
| Christmas | 25 December |
These are major festivals or observances that are not declared a holiday by government.