In computing any period of time specified in this chapter or §§ 5 or 6 of the Act (D.C. Official Code §§ 7-2804 and 7-2805) , calendar days shall be counted unless otherwise indicated.
In computing any period of time specified in this chapter, the day of the act, event, or default shall not be counted.
The last day of the period counted shall be included unless it is a Saturday, Sunday, or legal holiday, in which event the time period shall continue until the next day which is not a Saturday, Sunday, or legal holiday.
D.C. Mun. Regs. tit. 16, r. 16-1809