If you mean Shwetambar Paryushan, it begins on Tuesday, 8 September 2026. ( jaincenternj.org)
Explanation
Jain community calendars for 2026 list Shwetambar, Sthanakwasi, and Achalgach Paryushan as starting on 8 September 2026. They also show Samvatsari on 15 September 2026. ( jaincenternj.org)
Takeaway
So, for 2026, Paryushan starts on 8 September 2026. ( jaincenternj.org)