Tamu Lhosar is the main festival of the Gurung community.
It marks the beginning of the Gurung New Year which falls on the 15th day of Pusa, according to Vikram Sambat and is observed on December 30th in the western calendar.
The festival is celebrated with the family and community as a whole.
In Nepal, Tamu Lhosar is celebrated grandly with cultural tableaux in Gurung dominated districts, especially in Lamjung, Gorkha, Tanhun, Syangja, Manang, Kaski, Parbat etc.
The Gurung community living in the Kathmandu Valley also celebrate this festival by gathering at Tundikhel. On the occasion of the festival, along with a cultural program.