Especially in Eastern Nepal,the Udhauli festival is celebrated with religious ceremonies for two weeks with various programs. The nature-worshiping indigenous Limbu people have adopted an agro-based lifestyle and the time of harvest is called Chasok Tangnam with the change of seasons.

Experts say that it is also called Nawagi Utsav. According to the Limbu culture, Chasok Tangnam is believed to have started after Samva and Sinhafedangba worshiped Nawagi.