Answer

For Śvetāmbara Jains, Paryushana 2025 was generally observed from Wednesday, August 20, 2025, to Wednesday, August 27, 2025. Some Jain calendars list the formal Paryushana Parvarambha as Thursday, August 21, 2025, with Samvatsari on Thursday, August 28, 2025, depending on tradition and location. ( yja.org)

Explanation

Jain festival dates are based on the lunar calendar, so different communities may show a one-day variation in the exact start or end date. That is why you may see both August 20–27 and August 21–28 for Paryushana 2025. ( yja.org)

Takeaway

So, the simplest answer is: Paryushana 2025 was in late August 2025, mainly August 20 to August 27. ( yja.org)