Birthday Glitch Fix!
I figured out how to fix the birthday glitch. There are actually two possible causes. One is addressed in the video and the other is addressed in the comments section. https://www.youtube.com/watch...
Forum Discussion
Oh, thanks for posting here, I had this glitch too, and it's good to know that there is a solution without mods. I lost my patience after the second failure, so I've used mccc for aging up the birthday child.
