Posh Dassam refers to the tenth day (Dassam) of the Jain month of Posh (Posh/Posha). In the Jain lunar calendar, each month has specific days and observances, and the term “Posh Dassam” points to the tenth day within the Posh month. Practices on this day can vary between Digambar and Shwetambar communities, and between regional traditions; there isn’t a single, universal set of rituals for this day in all Jain texts.

If you’d like, I can explain how the Posh month fits into the Jain calendar and what some communities traditionally do on the tenth day, noting any differences between Digambar and Shwetambar practices.