Uposatha, a Pali word, is often translated as “Sabbath.” In Buddhist lands this traditionally follows the phases of the moon such that every time the moon is either full, empty (new), or half way in between (first or last quarter) we get an uposatha day. That is pretty cool in itself, but wait til you hear what Uposatha days are for! Anyway, they are generally seven days apart but sometimes six or eight.
Uposatha days are normally in Asia times for special Buddhist observances. Lay people will often spend the day at a monastery communing with monks or nuns, meditating, chanting,generally listening to a Dharma talk, offering to the Buddha or to the Sangha, and will also take eight or so monastic-style precepts for the day. Monks and nuns recite the Patimokkha every other Uposatha day, on full and new moon days, the hundreds of rules that they follow every day. This is pretty cool, but wait til you hear what you get to do on Uposatha days! Anyway, in Burma Uposatha days are like weekends; people do not have to go to work so that they are free for Buddhist observances. (more)