Borrowed from Hebrew חצות.
chatzot (uncountable)
- (Judaism) The time exactly halfway between sunset and sunrise; midnight.
2004 June 10, cindys, “God studies Torah and wears Tefillin?”, in alt.messianic[1] (Usenet):A wind would blow every night at chatzos and cause King David's harp to play, and this would wake him up and he would study torah.