They celebrate festival such as Pusha Purnima, Amba Nuakhia, Pirha Puja, Akhaya Trutiya, Asarhi, Gahma etc.
This passage describes a community that celebrates various festivals, including Pusha Purnima, Amba Nuakhia, Pirha Puja, Akhaya Trutiya, Asarhi, and Gahma.