Time in South Dakota Time in South Dakota South Dakota lies in both the Mountain Time Zone and the Central Time Zone. Mountain Time roughly contains the western half of the state, but not all of it. Rapid City is the largest city in the Mountain Time portion of the state. Central Time contains the eastern half of the state and roughly more of the state than the Mountain Time Zone and includes the state capital Pierre and the largest city, Sioux Falls. The 2 zones for South Dakota as given by zone.tab of the IANA time zone database. Columns marked * are from
South Dakota–South Dakota State football rivalry South Dakota–South Dakota State football rivalry The South Dakota–South Dakota State football rivalry (also the South Dakota Showdown Series) between the South Dakota Coyotes and the South Dakota State Jackrabbits is a yearly rivalry match-up in football between the two largest public universities in the state of South Dakota: the University of South Dakota in Vermillion and South Dakota State University in Brookings. South Dakota and South Dakota State are both football-only members of the Missouri Valley Football Conference in the FCS. The football series began in 1889 and has been played a total of 114 times as of 2018.