My mother kept me off school on my birthday. :P
I remember 2 things about my birthday where it lead to something extra through a school or work day.
#1 was in high school. I had forgotten to do something and it was my 5th minor error. With the system they had in place it meant I was getting 1h detention (my high school was public, pretty shit and in a poor area... so they were extra nazi on discipline to try and control the kids).
Now, I wasn't a problematic kid; I just forgot to do some stuff sometimes. Heck, I once beat up someone and the hall monitor pretty much looked the other way because I was the good kid beating his bully (and that's how I learned that smashing a bully's face in DOES stop the bullying - and they said violence never solved anything...)
But I digress...
As the teacher was writing the paper for my 5th and detention, I put all my chips on the table and went for the gamble asking her to just not write the 5th one as a birthday favor. She wrote it up, then signed it as if I went and did the detention (clearing all 5 instead of just hers) and told me happy birthday.
That was pretty cool of her.
#2 happened last year. I got to my cubicle in the morning and someone had written H A P P Y B I R T H D A Y on multi-color post-its and put them on my screen and left a treat next to my keyboard. That made my day.