I think #12, 22, and 32 are not used even in formal speaking or formal writing. Then, I'd like to know why #12, 22, and 32 are not used. Why aren't they used?
If it's difficult to explain why, would you please tell me what you feel when you hear or see them. Of course they're odd, awkward, foolish, or stupid, I think. But would you tell me more feelings other than odd, awkward, foolis
They are not used except as modified by Philip. The reason is that they cannot be interpreted as complete sentences, nor as greetings. They are simply noun phrases.
Have a merry Christmas is a complete sentence with a verb have and an object a merry Christmas. Merry Christmas! is a greeting.