D.C. Mun. Regs. tit. 17, § 4601
4601.1 Subject to § 4601.2, a license issued pursuant to this chapter shall expire at 12:00 midnight of December 31 of each even-numbered year.
4601.2 If the Director changes the renewal system pursuant to § 4006.3 of chapter 40 of this title, a license issued pursuant to this chapter shall expire at 12:00 midnight of the last day of the month of the birthdate of the holder of the license, or other date established by the Director.
SOURCE: Final Rulemaking published at 35 DCR 5999, 6000 (August 5, 1988).