So I note that the original Happy Birthday isn't in the DT. What if we forget the words?

Here's an alternate birthday song:

Happy birthday, happy birthday, we love you
And we hope that on this day your dreams come true
When you blow out the candles one light stays alight
That's the love that's in our eyes for you tonight.

If anyone can correct these lyrics, please do, or if you know the famous classical tune whose melody is used, you could mention that. :)