Chaumasi (Chaturmas) in Jainism refers to the four-month monsoon retreat during which monks stay in one place. The start and end dates are not fixed to a single Gregorian date; they move with the lunar calendar and differ between Digambar and Shwetambar traditions and from year to year.

If you want exact dates for this year, please tell me:

• whether you follow Digambar or Shwetambar calendar, and
• the specific year you have in mind.

I can then give you the precise Chaumasi start and end dates in the Gregorian calendar.