Does Superman ever make a reference to the New Year?
I've heard he has done so with Batman. Is that correct?
He attended at least one New Year's party (src)
On New Year's Eve 1999, Lex Luthor plans a spectacular party in Metropolis to usher in the New Year. Clark, Lois, and the Kents all attend.
Action Comics #81 (1944) makes a very clear reference to New Year.
Clark attends a New Year's party in Superman #474 (1991)