Which festival of Nagaland begins every year on December 1st?

The Hornbill Festival is the most famous cultural festival of Nagaland, celebrated every year starting on 1st December.
It was first organized in 2000 by the Government of Nagaland to promote and preserve the rich traditions of the Naga tribes.
The festival is named after the Hornbill bird, which is revered in Naga folklore and symbolizes respect and cultural pride.
It is held at the Naga Heritage Village, Kisama (near Kohima).
The festival showcases:
Traditional dances, songs, and folk music
Handicrafts and art exhibitions
Indigenous games and sports
Food fairs featuring Naga cuisine
Because of its scale and diversity, the Hornbill Festival is often called the “Festival of Festivals”.
Therefore, the festival of Nagaland that begins every year on December 1st is the Hornbill Festival.