5 CFR § 831.107
Computation of time
November 4, 2020
In computing a period of time prescribed by this part, the day of the action or event after which the designated period of time begins to run is not included. The last day of the period is included unless it is a Saturday, a Sunday, or a legal holiday; in this event, the period runs until the end of the next day which is not a Saturday, a Sunday, or a legal holiday.
[33 FR 12498, Sept. 4, 1968. Redesignated at 44 FR 37889, June 29, 1979]