In Jainism, Chaturmas (Chaumasa / Chaumasi Chaudas) always ends on:

Kartik Shukla Ekadashi (i.e., the 11th day of the bright half of the Kartik month in the Jain lunar calendar).

This is common for both Śvetāmbara and Digambara traditions. The exact English (Gregorian) date changes every year and also may differ by one day based on local panchang and region.

Examples:

• In 2025, Chaturmas ends on Kartik Shukla Ekadashi ≈ 3 November 2025.

If you tell me which year and your city/country, I can help you pin down the likely English calendar date, but religiously the rule is:

> End of Chaturmas = Kartik Shukla Ekadashi.