Balinese New Year (Nyepi) will take place on March 12, 2013. No flights will fly into or out of Bali on that date. Locals and tourists are required to observe 24 hours of silence (from 6 a.m. on March 12 to 6 a.m. on March 13), staying indoors, making no noise and turning off all lights. Consult your hotel staff for more information.
http://travel.gc.ca/destinations/indonesia