Losar is an Agricultural festival of Monpas tribe of Tawang district of Arunachal Pradesh .
Generally,the festival is a most important  festival of Mompas tribe and which  are mainly into agricultural and animal husbandry.During the festival the  community get together with friends and relatives and celebrate the ceremonial festival in a pompous manner.

Historically,The Monpas  are belonging to the Mongoloid stock.

Arunachal Pradesh, the abode of over 150 tribes has no dearth of occasions to showcase the colourful cultures and traditions. All of the tribes have festivals to be proud of. The festivals are no less charming for the foreign and domestic tourists who keep visiting the frontier state.

Have you ever heard of the Idu Mishimis? They are one of the most colourful tribes in Arunachal Pradesh. These people in the land of rising sun are known for their culture and tradition and festivals provide them the best opportunity to retain their unique identity. Their most vaunted festival is Reh to be dominated by puja offering feasts, song, dance and what not.

Bounteous harvest fetches no less hopes and joy for the Apatanis in Arunachal Pradesh. The colourful tribe in the north eastern state celebrate the season of bounteous harvest with Murung festival amid biting cold in January. Formerly, the festival was confined to a family where the near and dear ones were invited. But now a days, it is their occasion to openly share the joy with feast of meat and rice beer apart from their traditional songs and dances. Basically, it is celebrated in search of divine help for more wealth and prosperity.

Tagin, the name of a tribal group in Arunachal Pradesh has no less contribution in the diversified culture and tradition in the north eastern state. Festivals provide them the best opportunity to upkeep their uniqueness apart from strengthening unity and brotherhood. The most colourful and salient event of the Tagins is Si-Donyi festival. The annual event, basically, is a puja to appease the Si-Donyi for global peace and prosperity as they believe in the supreme power of the sungod. “Si” stands for the earth.