Nepal Sambat is the national calendar of Nepal. The calendar has lunar version for religious and cultural celebrations and solar version for administrative purposes.
The solar Nepal Sambat is based on earth’s revolution around sun. It has 365 days every year, and 366 on leap years.
|S.N.||Names of Month|
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The first five months Kachhalā, Thinlā, Ponhelā, Sillā and Chillā have 30 days per month. The sixth month Chaulā has 29 days every year and 30 days every leap year. The rest six months Bachhalā, Tachhalā, Dillā, Gunlā, Yanlā and Kaulā have 31 days per month.
A leap year is determined by adding 880 to the given number of year, then if the number is exactly divisible by 4, and not exactly divisible by 100 and in case is exactly divisible by 100, is also exactly divisible by 400. The leap day is inserted on the sixth month Chaulā.
The lunar Nepal Sambat is based in moon's revolution around earth. A year in the lunar calendar may have 354 to 378 days a year.