(a) Computation. In computing any period of time the day of the act or event from which the designated period of time begins to run shall not be included. The last day of the period so computed shall be included, unless it is a Saturday, a Sunday, or a legal holiday, or, when the act to be done is the filing of some paper in Court, a day or any part of a day in which the office of the Clerk is closed, in which event the period runs until the end of the next day which is not one of the aforementioned days, except where otherwise provided by statute. When a period of time prescribed or allowed is less than 11 days, intermediate Saturdays, Sundays and legal holidays shall be excluded in the computation except where otherwise provided by statute. As used in these rules, "legal holiday" includes New Year's Day, Birthday of Martin Luther King, Jr., Washington's Birthday, Memorial Day, Independence Day, Labor Day, Columbus Day, Veterans Day, Thanksgiving Day, Christmas Day, and any other day appointed as a holiday by the President or the Congress of the United States, or by the District of Columbia.(d) For motions; affidavits. A written motion, other than one which may be heard ex parte, and notice of the hearing thereof shall be served not later than 5 days before the time specified for the hearing unless a different period is fixed by order of the judicial officer. For cause shown such an order may be made on ex parte application. When a motion is supported by affidavit, the affidavit shall be served with the motion; and opposing affidavits may be served not less than one day before the hearing unless the judicial officer permits them to be served at a later time.(e) Additional time after service by mail. Whenever a party has the right or is required to do an act within a prescribed period after the service of a notice or other paper upon that party and the notice or other paper is served by mail, three days shall be added to the prescribed period.COMMENT
This rule is similar to SCR-Criminal 45(b), "Enlargement," is excluded since the conditions for enlargement of time periods are specified in D.C. Code § 16-2330.