When these rules state a specific number of days in which some action must or may be taken after a given event, the date of the given event is not counted in computing the time, and the last day of the period is deemed to end at close of business on that day. Saturday's, Sundays and state recognized legal holidays observed in New Mexico shall not be counted when computing the time. When the last day of the period falls on a Saturday, Sunday or legal holiday observed in New Mexico, then the last day for taking the action shall be the following business day.
N.M. Admin. Code § 11.21.1.8