Of course he wouldn’t. (Would he even have a birthday party? Who knows?)
Christmas was made up anyway, and it was even banned for a long time, by Christians!
See this excellent piece in the WA POST:
Would Jesus himself recognize his birthday celebration? Be serious. Not a chance.
Best ways to celebrate the birth and life of a Famous Historical Teacher:
-Try to find out what he or she really said and did (not too easy)
-Learn about the historical context when he or she lived
-Compare his or her teaching to other great teachers
-Ask yourself which of their lessons apply to our world today, and which do not
-Be aware of who controls how we read and understand this person
-Raise the question, “What does our ‘Christmas’ holiday (for example) really have to do with his life or teachings?” (if the answer is nothing, maybe we stop pretending and let it go?)
-See if there really are ways to “live the message” of this teacher
One last thought: If you say, “Happy Birthday Jesus”–what does that really mean for our world, when most of the world does not celebrate? Is your goal to make all the world worship your baby savior? Would you really like every last man, woman and child to say “Merry Christmas!” and you would be happy, and God would be happy? Really?
And. . .
What if Jesus himself would not come to his own party?