There are 2 different type of calender, most people known are Solar System and Lunar System. Solar system, mostly used internationally, is based on how many days the earth rotates around the sun ; so one year has an average 365 days. Lunar Calender is used in some Asian countries, is based on the time taken by the moon to rotate around the earth; which is 29 days + 12 hours + 44 minutes so the equitation times is equal 1 year for the Lunar system.
Bali uses yet another calender system. Balinese Calender uses the wuku system ( based on the week, there are 30 weeks in one cycle, in Balinese = Oton) and 2 “otons” in one year, so one “oton” means 210 days and one year in Balinese Calender System is 2 otons 0r 420 days)
Balinese calender system, widely used for religious purposes such as: to know the auspicious days for farming and raising animals, starting a business, determining the date of temple ceremonies and making birthday ceremonies or you can use this calender planning your Bali tours. simply choose the right date for the right tours itineraries.