Mississippi Code Title 1. Laws and Statutes § 1-3-67

When process shall be required to be served or notice given any number of days, the day of the act, event or default from which the designated period of time 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 or a legal holiday, or any other day when the courthouse or the clerk's office is in fact closed, whether 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 courthouse or the clerk's office is closed. When the period of time prescribed or allowed is less than seven (7) days, intermediate Saturdays, Sundays and legal holidays shall be excluded in the computation.