Answer

The Solahakaran Vrat traditionally begins on Shravan Vad 1 and continues for 16 days, ending on Shravan Vad 16 / Amas according to the Jain calendar tradition followed by many Jains.

Explanation

“Solahakaran” means sixteen causes/virtues that help a soul become worthy of attaining Tirthankar Nam Karma. During this vrat, devotees reflect on these 16 spiritual causes with devotion, discipline, and purity.

Because Jain calendar dates vary by location and local panchang, the exact English-calendar start date depends on your city/country and year.

Takeaway

Please check your local Jain Panchang or temple announcement for the exact Gregorian date of Shravan Vad 1 in your region.