S.C. Code Ann. § 53-5-80: Commercial paper or other security maturing on Sunday or legal holiday, time collected.

Any commercial paper or other security which shall mature and become payable and collectible on Sunday or on any legal holiday shall be deemed and taken and treated as maturing and becoming payable and collectible on the next day thereafter if such next day shall not be Sunday or a legal holiday, in which latter event it shall be deemed, taken and treated as due, maturing and collectible on the first day thereafter which is not a Sunday or a legal holiday.