Except as otherwise provided by law, in computing any period of time prescribed or allowed by this part, or by any notice, order, rule or regulation of the Commission or a presiding officer, the day of the act, event, or default after which the designated period of time begins to run is not to be included. The last day of the period so computed is to be included unless it is a Saturday, Sunday, or federal holiday, in which event the period runs until the end of the next day which is neither a Saturday, Sunday, nor a Federal holiday. Except in proceedings conducted under subpart D of this part, in computing a period of time which is 5 days or less, all Saturdays, Sundays and Federal holidays are to be excluded. [79 FR 33406, June 10, 2014]