S.D. Codified Laws § 53-10-3 (2026)
Time is never considered as of the essence of the contract, unless by its terms expressly so provided.
Source: CivC 1877, § 949; CL 1887, § 3573; RCivC 1903, § 1267; RC 1919, § 888; SDC 1939, § 10.0107.