Paryushan Parva 2025 (Digambar and Shwetambar)

• Shwetambar Jains: Paryushan Parva starts on Thursday, 21 August 2025 and ends on Thursday, 28 August 2025. Samvatsari (Forgiveness Day) is on 28 August 2025.
• Digambar Jains: Das Lakshan Parva (their Paryushan) starts the day after Shwetambar Paryushan ends, i.e., Friday, 29 August 2025, and runs for 10 days until Sunday, 7 September 2025. Anant Chaturdashi falls on 7 September 2025. Kshamavani (Forgiveness Day) is commonly observed on Monday, 8 September 2025, though local sanghs may differ by a day.

In short:

• Shwetambar: 21 Aug 2025 to 28 Aug 2025 (Samvatsari on 28 Aug)
• Digambar: 29 Aug 2025 to 7 Sep 2025 (Anant Chaturdashi on 7 Sep; Kshamavani around 8 Sep)

You can read more here and here