Since 1951 the Republic Day Parade has held annually in Delhi to mark India's Republic Day, celebrating the enactment in that day in 1950 of the Constitution of India. It is the country's principal military parade honoring the Armed Forces for its long record of service to the country and is also a showcase of the achievements of India's defence industry, with a number of vehicles and aircraft featured being locally produced by factories under the Ministry of Defence and by local defense production firms. Parades are also held on the service holidays of the Armed Forces: