The uposatha is the weekly holy day of the Buddhist calendar, marked by the phases of the moon. On full and new moon days monks gather to recite the code of discipline, and lay people visit monasteries, hear teachings and keep eight precepts, including abstaining from food after noon.
Uposatha
The Buddhist observance day, at the new and full moon, when monks recite the rules and lay people keep extra precepts.
Also: Uposatha