The Collaborative International Dictionary of English v.0.48:

Target date \Tar"get date\, n.
   The date set as a goal for completion of some activity.
   [PJC]

Moby Thesaurus II by Grady Ward, 1.0:

61 Moby Thesaurus words for "target date":
   A-day, D day, H hour, border line, bound, boundary,
   boundary condition, boundary line, bourn, break boundary,
   breakoff point, ceiling, charged moment, circumscription, compass,
   confine, critical moment, crucial moment, cutoff, cutoff point,
   deadline, decisive moment, delimitation, determinant,
   division line, eleventh hour, end, extremity, finish, floor,
   frontier, hedge, high-water mark, interface, kairos,
   kairotic moment, limen, limit, limitation, limiting factor, line,
   line of demarcation, low-water mark, lower limit, march, mark,
   mete, moment of truth, nick of time, pregnant moment,
   psychological moment, start, starting line, starting point, term,
   terminal date, terminus, threshold, time allotment, upper limit,
   zero hour