49 CFR 821.10 : Transportation (§ 1.1 To Parts 1581-1699) — (§ 572.1 To Parts 851-999) — Other Regulations Relating To Transportation (Continued) (§ 572.1 To Parts 851-999) — National Transportation Safety Board (§ 800.1 To Parts 851-999) — Rules Of Practice In Air Safety Proceedings (§ 821.1 To § 821.64) — General Rules Applicable To Petitions For Review, Appeals To The Board, And Appeals From Law Judges Initial Decisions And Appealable Orders (§ 821.5 To § 821.21) — Computation of time.

In computing any period of time prescribed or allowed by this part, by notice or order of a law judge or the Board, or by any applicable statute, the date of the act, event or default after which the designated period of time begins to run is not to be included in the computation. The last day of the period so computed is to be included unless it is a Saturday, Sunday or legal holiday for the Board, in which event the period runs until the end of the next day which is not a Saturday, Sunday or legal holiday. In all cases, Saturdays, Sundays and legal holidays for the Board shall be included in the computation of time, except they shall not be included in computations of time respecting petitions for review of determinations as to the existence of emergencies under § 821.54.