35 Miss. Code. R. 1-01-711
When an appeal, objection, or other document is required by statute, regulation or the Department to be filed with the Review Board within any number of days; the day of the act, event, or default from which the designated period begins to run shall not be included. The last day of the period so computed shall be included unless it is a Saturday, a Sunday, a legal holiday, or any other day when the offices of the Department are closed, with or without legal authority, in which event the period runs until the end of the next day which is not a Saturday, a Sunday, a legal holiday or any other day when the office of the Department is closed. Legal holidays for the Department are found at Miss. Code Ann. Section 3-3-7(1). When the period prescribed or allowed is less than seven days, intermediate Saturdays, Sundays, and legal holidays shall be excluded from the computation.
35 Miss. Code. R. 1-01-711