Poṣha-daśamī (Posh Dashami) is the birth anniversary of Parśvanātha and is usually observed on the 9th, 10th, and 11th days of the dark half of Poṣha/Māgsar, with the exact Gregorian date shifting by region.

For this year (2025), the Poṣa‑daśamī date is expected around December 14, 2025 (Vad Dashami). Exact day can vary by local lunar sighting and regional panchang, so your temple or local Jain panchang should be checked for the precise date. Digambar and Śvetāmbara calendars may have slight differences, but the essence remains Parśvanātha‑jayantī.