Answer

In 2026, Kalpasutra day is traditionally observed during Paryushan, on the day when the Kalpa Sutra is read or recited, especially in the Śvetāmbara Jain tradition.

The exact calendar date can vary by local Jain sangh, calendar system, and location. In most Śvetāmbara communities, the Kalpa Sutra is commonly read during Paryushan, especially around Mahavir Janma Vanchan.

Explanation

The Kalpa Sutra is an important Jain scripture that includes, among other things, the life accounts of the Tirthankars, especially Bhagwan Mahavir Swami.

During Paryushan Parva, many Śvetāmbara Jain communities perform Kalpa Sutra Vanchan. One of the most important days connected with it is Mahavir Janma Vanchan, when the birth of Bhagwan Mahavir is ceremonially read.

Takeaway

For the exact 2026 date in your city or sangh, it is best to follow your local Jain temple or sangh calendar, because Jain festival observance can differ slightly by location and tradition.