The Collaborative International Dictionary of English v.0.48:

dateable \dateable\ adj.
   that can be given a date. Opposite of undatable. [Narrower
   terms: dated]

   Syn: datable.
        [WordNet 1.5]

              a concrete and dateable happening   --C. W.
                                                  Shumaker

The Collaborative International Dictionary of English v.0.48:

dated \dated\ adj.
   1. marked by features of the immediate and usually discounted
      past.

   Syn: outmoded; pass['e]. [WordNet 1.5 +PJC]

   2. bearing a date; as, dated and stamped documents.
      [WordNet 1.5]

The Collaborative International Dictionary of English v.0.48:

Date \Date\, v. t. [imp. & p. p. Dated; p. pr. & vb. n.
   Dating.] [Cf. F. dater. See 2d Date.]
   1. To note the time of writing or executing; to express in an
      instrument the time of its execution; as, to date a
      letter, a bond, a deed, or a charter.
      [1913 Webster]

   2. To note or fix the time of, as of an event; to give the
      date of; as, to date the building of the pyramids.
      [1913 Webster]

   Note: We may say dated at or from a place.
         [1913 Webster]

               The letter is dated at Philadephia. --G. T.
                                                  Curtis.
         [1913 Webster]

               You will be suprised, I don't question, to find
               among your correspondencies in foreign parts, a
               letter dated from Blois.           --Addison.
         [1913 Webster]

               In the countries of his jornal seems to have been
               written; parts of it are dated from them. --M.
                                                  Arnold.
         [1913 Webster]

WordNet (r) 3.0 (2006):

dated
    adj 1: marked by features of the immediate and usually
           discounted past

Moby Thesaurus II by Grady Ward, 1.0:

91 Moby Thesaurus words for "dated":
   ago, ahead of time, anachronistic, annalistic, antedated,
   antiquated, antique, archaic, back-number, beforehand,
   behind the times, behind time, behindhand, belated, blown over, by,
   bygone, bypast, calendarial, calendric, chronogrammatic,
   chronographic, chronologic, chronoscopic, dead, dead and buried,
   deceased, defunct, demode, departed, diaristic, disused, early,
   elapsed, expired, extinct, finished, foredated, forgotten, gone,
   gone glimmering, gone out, gone-by, has-been, horologic,
   intercalary, intercalated, irrecoverable, lapsed, late,
   metachronistic, metronomic, misdated, mistimed, no more, obsolete,
   old, old hat, old-fashioned, old-timey, oldfangled, out,
   out of date, out of fashion, out of season, out of style,
   out of use, out-of-date, outdated, outmoded, outworn, over,
   overdue, parachronistic, passe, passed, passed away, past,
   past due, postdated, prochronistic, run out, styleless, tardy,
   temporal, timekeeping, unfashionable, unpunctual, unseasonable,
   vanished, wound up