Probably my favorite birthday episode of
The Office is the "Lecture Circuit" episode (S5:E16) where Dwight and Jim have to throw together a belated party for Kelly without the help of the Party Planning Committee.
Jim: Why have you chosen brown and grey balloons?
Dwight: They match the carpet.
Jim: What is that?
It is your birthday... period.
Dwight: Just stating a fact.
Jim: Not even an exclamation point?
Dwight: This is more professional. It's not like she discovered a cure for cancer!
Jim: I can't believe how bad this looks.
Although Kelly is slightly horrified at what they come up with, I would tend to agree with Dwight. I'm not big on making a big deal of my birthday, and have been plotting which probably-fake-but-still-semi-plausible age to give if anyone at work somehow found out it was my birthday... and then asked how old I was (I know, it sounds a little silly once I see it spelled out... Renata and I came up with 38, if you're wondering).
I won't get to see anyone's reaction today, however, because I am currently sitting at home sick.