Nyepi is the celebration of the new year, based off one of the three calendars used by the Balinese Hindus (Nyepi is based on the Sasih, a monthly calendar of Indian origin; they also use the Gregorian and the Pawukon, a 210-day weekly calendar of Javanese origin). Also referred to as the "Day of Silence", Nyepi is reserved for self-reflection and all distractions are prohibited (no lights, no fires, no entertainment, no working, no traveling, etc.). People are meant to remain indoors all day, except for the Banjar (traditional security force that ensures prohibitions are followed). Since Bali's population is largely Hindu, the entire island participates in this holiday. This year, Nyepi was from 6 AM on the 23rd until 6 AM on the 24th.