D.C. Code § 15-304
If the return of a writ of execution is not made on or before the return day expressed in the writ it may nevertheless be made afterwards as of that date.
Dec. 23, 1963, 77 Stat. 525, Pub. L. 88-241, § 1
1973 Ed., § 15-304.
1981 Ed., § 15-304.