Miss. Code Ann. § 37-13-61: Miss. Code Ann. § 37-13-61

The local school board shall have the power and authority to fix the date for the opening and closing of the school term, subject to the minimum number of days which schools must be in session during a scholastic year, as prescribed under Section 37-13-63 . However, local school boards are authorized to keep school in session in excess of the minimum number of days prescribed in Section 37-13-63 .