At 11:30 a.m. on April 30, 1975, the flag of the National Front for the Liberation of South Vietnam fluttered on the roof of the Independence Palace, marking a sacred moment for the Vietnamese people, gloriously ending the resistance war against the US for national salvation which lasted for 21 years (1954 - 1975). Since then, April 30 has become the official holiday of the Vietnamese people, named the Victory Day, or the Reunification Day