Nanakshahi Calendar, and it takes its name from Guru Nanak Dev Ji, the founder of Sikhism. Sikhism has used the traditional Vikrami (or Bikrami) calendar, shared by Sikhs and Hindus in North India, to set the date of its festivals. The new calendar makes life much easier for Sikhs as their holy days no longer move about the calendar from year to year. Gurpurbs (celebrations devoted to particular Gurus) now always happen on the same date, and occur once (and once only) in every year. The epoch of this calendar is the birth of the first Sikh Guru, Guru Nanak Dev in 1469. New Year’s Day falls annually on what is March 14 in the Gregorian Western calendar. The calendar doesn’t fix the date of all Sikh festivals. Those Sikh festivals, which are celebrated at the same time as similar Hindu religious events, such as Diwali and Hola Mohalla, will still have their dates set by the Vikrami calendar.