Days
Days are calendar days. In computing any period of time described in Subchapter V, Chapter 35 of Title 31, United States Code, including those described in this part, the day from which the period begins to run is not counted, and when the last day of the period is a Saturday, Sunday, or Federal holiday, the period extends to the next day that is not a Saturday, Sunday, or Federal holiday. Similarly, when the Government Accountability Office (GAO), or another Federal agency where a submission is due, is closed for all or part of the last day, the period extends to the next day on which the agency is open.