Paryushan Parva is a major festival of Jains which lasts for seven days culminating in Samvatsari Parvi (forgiveness day).
It is usually celebrated in August or September in Hindi calendar Bhadrapad Month’s Shukla Paksha.
On this day, Jains greet by saying Michhami Dukkadam and observe a whole-day fast.
Michhami Dukkadam is an ancient phrase from Prakrit language, to seek forgiveness for any ill-will or bad deeds and offering a renewal of relationship.