Miss. Code Ann. § 25-1-97

The capitol commission of the state is hereby authorized and empowered to fix the hours for the opening and closing of public offices of the state commensurate with the seasons of the year. The business hours of all of the state public offices, departments, boards, commissions, and agencies shall be uniform, and said offices shall be open for business eight (8) hours per day Monday through Friday of each week except state holidays, with the capitol commission to set the opening and closing hours by its order from time to time. Nothing contained in this section shall be construed to prohibit any office, department, board, commission, or agency to conduct essential business outside of the regular business day hours where the executive head or governing body deems it necessary. For any state holiday fixed under Section 3-3-7, Mississippi Code of 1972 , falling on a Saturday or Sunday, the following Monday may, in the discretion of the executive head or governing body of a state agency, be utilized in lieu of the legal holiday.