When did Nepal become a democratic republic?

Nepal officially became a democratic republic on May 28, 2008.12

On that date, the newly elected constituent assembly voted to abolish the monarchy, ending more than two centuries of royal rule. This transition followed years of political instability, including a Maoist insurgency and the signing of a peace accord in 2006, which led to the election of the assembly in April 2008. Following the declaration of the republic, the country continued to operate under an interim constitution until a new permanent constitution was promulgated on September 20, 2015, establishing a secular federal-style republic.21