In 1995, the Shiromani Gurdwara Parbandhak Committee (SGPC) decided to implement the new Reformed Nanakshahi Calendar from 1999 CE. The changes were recommended by the Calendar Reform Committee under the aegis of The Institute of Sikh Studies, Chandigarh.
In 1998, per the Shiromani Gurdwara Prabandhak Committee (SGPC) General House Resolution, SGPC released a calendar that was “scientific, correct and based on Gurbani” and factual dates from the Sikh History. It was highly acclaimed and the entire Sikh Panth was asked to follow this calendar. That was released on the 300th year of Khalsa’s Creation in 1999.