The Nanakshahi calendar is a tropical solar calendar that was adopted by the Shiromani Gurdwara Prabhandak Committee (SGPC) to determine the dates for important Sikh events. It was designed by Pal Singh Purewal to replace the Saka calendar and has been in use since 1998. Since 1998, amongst the critics, no-one has come forward with suggestions of specific changes, other than to suggest that the Sikhs should revert to the Vikrami calendar. The epoch of this calendar is the birth of the first Sikh Guru, Nanak Dev in 1469. New Year's Day falls annually on what is March 14 in the Gregorian Western calendar.
