Wikipedia
Kshamavani
Kshamavani or "Forgiveness Day" is a day of forgiving and seeking forgiveness for the followers of Jainism. It is celebrated on the Samvatsari, the last day of the annual Paryusana festival, which coincides with the Chaturthi, 4th day of Shukla Paksha, in the holy month of Bhadrapad, according to the Jain calendar. " Micchami Dukkadam" is the common phrase when asking for forgiveness. It is a Prakrit phrase meaning, May all the evil that has been done be fruitless.