Answer

Yes — for the Shwetambar Jain tradition, Samvatsari in 2026 falls on Tuesday, 15 September 2026. Jain calendar listings and community event calendars show Samvatsari Parva on that date. ( drikpanchang.com)

Takeaway

So if you are referring to Shwetambar Samvatsari, 15 September 2026 is correct.