The state's calendar is anchored by vibrant cultural, agricultural, and religious festivals.
* **Pongal:** A four-day harvest festival celebrated in January, which is the most important and widely celebrated festival in the state, honoring the sun, nature, and farm animals. * **Chennai Music Season (Margazhi):** A six-week-long festival (December–January) featuring thousands of Carnatic music and classical dance performances across Chennai. * **Chithirai Festival:** A massive month-long religious celebration in Madurai re-enacting the wedding of Goddess Meenakshi and Lord Sundareswarar. * **Mahamaham:** A major Hindu festival celebrated every 12 years in Kumbakonam, attracting millions of pilgrims for a holy dip in the Mahamaham tank.