I see about 200 to 400 different i.d.'s a night. I look at the face, weight, height, expiration date, and the birth date. If it's not the 21st year (the year you have to be born in to be 21) I don't really look at the day.
For example: This is the year 2007, in order to be 21 years of age you had to have been born in the year 1986 on todays date. If you were born on Dec 12, 1986 then your still 20 years old and I'm not letting you in until Dec 12 comes around.
So does it really matter to me that it's your birthday? No. Honestly, I don't care. It doesn't matter to me at all whether it's your birthday or not. The only thing that matters to me is that your old enough to be in the establishment.
On an average night there's three or four people celebrating their birthdays. Half of them can make it in the place the other half are already too wasted to come in. I have no problems stopping a wasted person from coming into the establishment when they can barely stand up. Birthday or not.
It amazes me that people actually think that a doorman doesn't look at your birth date just because he doesn't make a big deal about it being your birthday. Who are you again? Oh that's right, your just a guy that walked in with a very few friends. Your not a regular and your not anyone really important. Your a customer just like the other 100 people that walked in earlier. The year is what's important not the day. The only time the date is important is when it's your 21st birthday. You should be used to that already.
I guess if your night has been going really well then you might smile and ask if I noticed the day. Then I'll look and say happy birthday. If your having a bad night you might complain to your friends that the doorguy didn't even notice.
Either way I don't know you so I probably don't care.