For 2026, as per JainKnowledge:

• Varshitap starts on: Chaitra Shukla Ashtami (8th day of the bright half of Chaitra).
• Varshitap ends on: Vaishakh Shukla Tritiya (Akshaya Tritiya).

The exact English (Gregorian) dates change every year because this is based on the Jain lunar calendar, so you should confirm from a reliable Jain Panchang or with your Guru / local sangh for your city’s timings.

You can read more here