Every full moon day is known as a Poya in Sinhala; this is when a practicing Buddhist visits the Temple for the rituals of worship. There are 12 or 13 Poyas per year. The term poya is derived from the Pali and Sanskrit form uposatha (from upa + vas: to fast) primarily signifying "fast day". Generally shops and businesses are closed on Poya Days, and the sale of alcohol and meat is forbidden. If a month has two Poya Days the name of the second one will be preceeded by ”Adhi” (”extra” in Sinhala) as in ”Adhi Vesak”, ”Adhi Poson”, etc.