In ancient Indian Buddhist monastries, a ceremony called

In ancient Indian Buddhist monastries, a ceremony called Pavarana used to be held, It was the

1. occasion to elect the Sanghparinayaka and two speakers one on Dhamma and the other on Vinaya
2. confession by monks of their offences committed during their stay in the monasteries during the rainy season
3. ceremony of initiation of new person into the Buddhist Sangh in which the head is shoved and when yellow robes are offered
4. gathering of Buddhist monks on the next days to the full moon day of Asadha when they take up a fixed abode for the next four months of rainy season