Source : Webster's Revised Unabridged Dictionary (1913)

Hallowmas \Hal"low*mas\, n. [See {Mass} the eucharist.]
   The feast of All Saints, or Allhallows.

         To speak puling, like a beggar at Hallowmas. --Shak.

Source : WordNet®

Hallowmas
     n : a Christian feast day honoring all the saints; first
         observed in 835 [syn: {All Saints' Day}, {Allhallows}, {November
         1}, {Hallowmass}]