(c/c/p TVTropes) Jack Frost is the personification of cold in the air and the frost designs on windows. Unlike many, he is not necessarily associated with a holiday; although naturally he tends to be most active in Winter simply because that's where the action is.
He can be depicted as playful and mischievous as a snow day; or as cruel as the killing ice as this list shows.
On Screen History of Jack Frost
by Arius