Answer

In 2026, Chomasa / Chaturmas began around Devshayani Ekadashi, which fell on July 25, 2026.

Explanation

In Jain tradition, Chomasa refers to the four-month rainy-season period during which Jain monks and nuns generally stay in one place and do not travel, to minimize harm to small living beings that become abundant during the rains.

It usually starts around Ashadh Shukla Ekadashi and continues until around Kartik Shukla Ekadashi.

Takeaway

So, for 2026, Chomasa started on July 25, 2026.