Nanakshahi calendar designed by Pal Singh Purewal to replace the Bikrami calendar. The epoch of this calendar is the birth of the first Sikh Guru, Nanak Dev in 1469 and the Nanakshahi year commences on 1 Chet. New Year's Day falls annually on what is March 14 in the Gregorian Western calendar. The start of each month is fixed. According to Kapel (2006), the solar accuracy of the Nanakshahi calendar is linked to the Gregorian civil calendar. This is because the Nanaskhahi calendar uses the tropical year instead of using the sidereal year which is used in the Bikrami calendar or the
Silla (month) and Maha Shivaratri (Nepal Bhasa: सिला चह्रे "Silā Charhe") on the 14th day of the dark fortnight. Shree Panchami is the first day of spring while Shivaratri honors the Hindu deity Shiva. On the full moon day, the month-long Swasthani sacred story reciting festival ends. Silla (month) Sillā (Nepal Bhasa: सिल्ला) is the fourth month in the Nepal Era calendar, the national lunar calendar of Nepal. The month corresponds to Magha (माघ) in the Hindu lunar calendar and February in the Gregorian calendar. Sillā begins with the new moon and the full moon falls on the 15th of the lunar