Most festivals are fixed by calendars different from the Western version (see page 91), so they change each year. Look for the Indonesian Directorate of Tourism's annual Calendar of Events, which is published in Bali and gives dates and locations of temple festivals.
Most festivals are fixed by calendars and change yearly (not Western version, p. 91) . The Indonesian Directorate of Tourism's annual Calendar of Events, published in Bali gives info on festivals.