The end of Lent is marked by Ok Phansa. Ok Phansa marks the end of the "rains retreat" and the beginning of Krathin. Monks can return to their social duties and travel. Ok Phansa is also celebrated by lay people offering food and gifts to the monks. Ok Phansa is celebrated throughout Thailand but the celebrations vary by region.
According to legend Ok Phansa also celebrates the Buddha‘s return to earth, after spending one Lent season, which is 3 month long, preaching in heaven. It also marks the end of the Lent period of retreat and the beginning of Krathin, the traditional time for presenting new robes and other gifts to monks at temples throughout the country. This ceremony must be completed within one month of the end of Buddhist lent and only one ceremony in a year.