D.C. Mun. Regs. tit. 18, § 3009
3009.1 The Bureau may set a date, time, and place of hearing different from that shown on the face of the ticket so long as the respondent is given timely notification by regular mail.
3009.2 The Bureau may set a date, time, and place of hearing when the alleged violator fails to answer.
3009.3 Hearings will be held daily from 8:30 a.m. to 4:00 p.m., except Saturdays, Sundays, and holidays observed by the District government, and except during those hours established by the Chief of the Bureau or the Chief Hearing Examiner.
3009.4 The Chief of the Bureau, at his or her discretion, may set additional or alternative times and days for hearings to meet the needs of the Bureau.