Posh Dashami (Posh/Dashami) 2025 is expected around December 14, 2025 (Vad Dashami). Lokal lunar sighting can cause a one-day variation in some Panchangs. Parshwanath Panch Kalyanak Puja aane wale samay par kai derasaron/mandir me is dashami ke aas-paas ho sakti hai, lekin tithi ki sahi tareekh jagah-bhar mein thoda alag ho sakti hai. Isliye apne local derasar ki chauthi/panchang ki jankari dekhna uchit rahega. You can read more here