Pavāraṇā (Pali; Sanskrit: Pravāraṇā) is a Buddhist ceremony held on Aashvin full moon of the lunar month.
It marks the end of the three lunar months of Vassa, sometimes called "Buddhist Lent."
According to the Vinaya (Mahavagga, Fourth Khandhaka, section I), in the time of the Buddha, once during this rainy season, a group of normally wandering monks sought shelter by co-habitating in a residence.
After this rains retreat, when the Buddha learned of the monks' silence, he described such a measure as "foolish."
Instead, the Buddha instituted the Pavarana Ceremony as a means for dealing with potential conflict and breaches of disciplinary rules (Patimokkha) during the vassa season.