The Nanakshahi Calendar is a solar calendar used primarily by the Sikh community. It was introduced in 2003 to standardize the dates of Sikh festivals and events, aligning them with the solar year. The calendar is named after Guru Nanak, the founder of Sikhism, and begins in 1469, the year of his birth. This calendar consists of 12 months, similar to the Gregorian calendar, but with different names and lengths. It is designed to ensure that important Sikh celebrations, such as Vaisakhi and Gurpurab, occur in the same season each year, promoting consistency in observance.