Season's Greetings in Japanese

This is a quick reminder. How would you say Merry Christmas and Happy New Year in Japanese?

Merry Christmas: メリー　クリスマス (meri kurisumasu)

Happy New Year before January 1st: よい　おとしを (yoi otoshi o)

Happy New Year after January 1st: あけまして　おめでとう (akemashite omedeto)