Answer

In the Digambar Jain tradition, Kshama Bhavana is especially observed on Kshamavani Day, which comes after Das Lakshan Parva.

It is generally observed on the next day after Anant Chaturdashi, i.e. on Ashwin Krishna Pratipada according to the Jain/Hindu lunar calendar.

Explanation

During Das Lakshan Parva, Digambar Jains reflect on ten supreme virtues, beginning with Uttam Kshama — supreme forgiveness.

After the completion of Das Lakshan, Kshamavani is observed as a day of forgiveness, where people ask each other:

“Micchami Dukkadam” or “Uttam Kshama”

This means asking forgiveness for any hurt caused knowingly or unknowingly.

Takeaway

So, in Digambar Jain tradition, Kshama Bhavana / Kshamavani is observed the day after Anant Chaturdashi, after the completion of Das Lakshan Parva.