Answer

Paryushan generally starts on different dates each year because it follows the Jain lunar calendar.

For Śvetāmbara Jains, Paryushan usually lasts 8 days and begins on Bhadrapad Vad 12.

For Digambara Jains, the festival is observed as Das Lakshan Parva, usually for 10 days, beginning from Bhadrapad Shukla 5.

Explanation

The exact English calendar date changes every year. Also, the date may vary slightly depending on local Jain panchang and tradition.

Takeaway

To know the exact date for your city and year, it is best to check the local Jain sangh or Jain panchang.