During World War II (1939-1945), Kremenchuk suffered heavily under Nazi occupation. It was occupied from September 15, 1941 to September 29, 1943. More than 90% of the city's buildings were leveled over the course of the war. 29 September, the day when the city was liberated from the Nazis in 1943, is celebrated in Kremenchuk as the City Day. Despite a remarkable post-war recovery and a healthier economy, Kremenchuk lacks much of the architectural charm and distinctly Ukrainian (rather than Russian) character of its sister city, the oblast capital of Poltava.