what is the date (Tithi) when Paryusan starts ?
Paryushan starts on the fifth day of the Shukla Paksha in the month of Bhadrapada, i.e., Bhadrapada Shukla Panchami. This is the Panchami tithi.
In 2025:
- Śvetāmbara Paryushan begins on Bhadrapada Shukla Panchami (Shukla Paksha Panchami) — August 21, 2025.
- Digambar Paryushan (Das Lakṣaṇa Parva) begins the day after Śvetāmbara ends — August 29, 2025.