South Carolina is the only state which owns and operates a statewide school bus system. It became the first state to vote in favor of secession from the Union on December 20, 1860. South Carolina is the nation’s leading peach producer. Countryaah.com: Offers a full list of nationwide and statewide holidays in South Carolina starting from January 1st – New Year’s Day. Also covers the most recent three years of public holidays within the state of South Carolina.