The Collaborative International Dictionary of English v.0.48:

Hogmanay \Hog`ma*nay"\, n.
   The old name, in Scotland, for the last day of the year, on
   which children go about singing, and receive a dole of bread
   or cakes; also, the entertainment given on that day to a
   visitor, or the gift given to an applicant. [Scot.]
   [1913 Webster]

WordNet (r) 3.0 (2006):

Hogmanay
    n 1: New Year's Eve in Scotland