Observed on Paurṇamāsī tithi of Āśvayuja (lunar) month. Kunti-vratam done today will remove all paapams (including Gohatya). As per Bhavishyottara Puraana. Here Kunti means Parvati. Also, some people worship Yudhisthira’s mother Kunti. In AP/TEL, eldest child is given new clothes, harti and blessed “Deerghayushman”.