-Season’s Greetings or Seasons Greetings? Season’s Greetings is correct!
-Go with Happy New Year, not Happy New Year’s or Happy New Years
-Proper nouns like “Christmas” should always be capitalized, but the word “merry” should only be capitalized if you’re starting the line with the greeting “Merry Christmas.” If “merry” falls in the middle of a sentence, it should not be capitalized.
-If your last name is Johnson and you want to send a card from your family, simply add an “s”: The Johnsons (“Merry Christmas from the Johnsons!”).