From the ArcaMax Publishing, Vocabulary Newsletter:
http://www.arcamax.com/news/vocabulary/s-362805-544245
Hogmanay \hog-muh-NAY; HOG-muh-nay\ (noun) - The name, in Scotland,
for New Year's Eve, on which children go about singing and asking for
gifts; also, a gift, cake, or treat given on New Year's Eve.
"The bells were almost lost in the raucous bonhomie of the Hogmanay
dance." -- Val McDermid, 'The Distant Echo'
The origin of the word Hogmanay is unknown.