Pakistan Day, or Pakistan Resolution Day, also Republic Day, is a national holiday in Pakistan primarily commemorating the adoption of the first Constitution of Pakistan during the transition of the Dominion of Pakistan to the Islamic Republic of Pakistan on 23rd March 1956, making Pakistan the world’s first Islamic republic.
The day also celebrates the adoption of the Lahore Resolution by the Muslim League at the Minar-e-Pakistan, which called for the creation of an independent sovereign state from the provinces with Muslim majorities located in the North-West and East of British India (excluding autonomous princely States) on 23rd March 1940.