Here is a list of notable events happening in Tamil Nadu during December:

• Madras Music Season: A renowned music festival in Chennai featuring Carnatic music performances by both professional and amateur artists. It typically spans from mid-November to January. ([en.wikipedia.org](https://en.wikipedia.org/wiki/Madras_Music_Season?utm_source=openai))
• Mamallapuram Dance Festival: Held near Arjuna's Penance in Mahabalipuram, this festival showcases classical dance forms like Bharatanatyam, Kathak, and Odissi. It usually starts in late December and continues for about 30 days. ([travelogyindia.com](https://www.travelogyindia.com/blog/top-25-fairs-and-festivals-in-india-in-december/?utm_source=openai))
• Chennai Book Fair: An annual event organized by the Booksellers and Publishers Association of South India (BAPASI), featuring a vast collection of books from various publishers. It typically takes place between the last week of December and the third week of January. ([en.wikipedia.org](https://en.wikipedia.org/wiki/Chennai_Book_Fair?utm_source=openai))
• Chennaiyil Thiruvaiyaru: An eight-day Carnatic music festival held from December 18 to 25 at Kamarajar Arangam in Chennai, featuring performances by renowned musicians and dancers. ([en.wikipedia.org](https://en.wikipedia.org/wiki/Chennaiyil_Thiruvaiyaru?utm_source=openai))
• Margazhi Music and Dance Festival: A month-long festival in Chennai celebrating Tamil classical music and dance, running from mid-December to mid-January. ([agoda.com](https://www.agoda.com/travel-guides/india/chennai/chennai-festival-2025-dive-into-culture-cuisine-community/?utm_source=openai))
• Thiruvathira Festival: Celebrated on the full moon night of the Tamil month of Margazhi (December–January), this festival involves recitation of Tamil hymns and grand processions in Shiva temples across Tamil Nadu. ([en.wikipedia.org](https://en.wikipedia.org/wiki/Thiruvathira?utm_source=openai))
• Coimbatore Shopping Festival: A 12-day consumer fair held at the Codissia Industrial Complex in Coimbatore, featuring a wide range of products and entertainment activities. ([utsav.gov.in](https://utsav.gov.in/public/event-category/seasonal?utm_source=openai))
• Chennai International Film Festival: An annual event showcasing a diverse selection of films from around the world, typically held in December. ([adventurebackpack.com](https://adventurebackpack.com/chennai-madras-events/?utm_source=openai))

Please note that event dates and details may vary each year. It's advisable to check the official websites or local sources for the most current information.