CultureEthnic GroupFestivals Tamu Lhosar by Pratigya Sedhai by Pratigya Sedhai Tamu Lhosar is the main festival of the Gurung communities of Nepal and also known as ‘Tolo’ or ‘Tola’ Lhosar. It is celebrated on 15 Poush every year, based on Nepali Bikram Sambat.