If your born on February 29th does that mean you only age once every four years? So if I'd been born on February 29th 1977 I'd only be 8.
98 1/2 years on earth isn't so bad, and he was diabetic, so it's not like he could have had the cake.
I feel bad for people born on Feb 29 because they have to put up with dumb leap year jokes all the time. As a twelve year old, I imagine being told you are only 3 would be quite annoying.