Answer

For Derawasi / Śvetāmbara Murtipujak Jains, Paryushan usually starts on Bhādrapad Vad 12 and continues for 8 days, ending with Samvatsari on Bhādrapad Vad 4.

Explanation

The exact Gregorian calendar date changes every year because it follows the Jain lunar calendar.

If you are asking for a specific year, please tell me the year, and I can answer accordingly if the date is clearly established within Jain tradition.

Takeaway

Derawasi Paryushan is traditionally an 8-day sacred observance, beginning before Samvatsari and focused on pratikraman, forgiveness, self-discipline, and spiritual purification.