Half-birthdays!

Every February 28th I always have to remind everyone around me that it's my half-birthday. I miss the days when people asked you how old you are and you said, "six and a half," or "seven and three quarters." One time I reminded my mom of my half-birthday so frequently that she even made me a cake! It was great! So, today I spent my half birthday in Fullerton, attending classes and sitting in Starbucks writing a paper... fun stuff! Anyhow, to procrastinate I looked up half birthdays on Wikipedia and this is what I found:

Half-birthday
From Wikipedia, the free encyclopedia
A half-birthday is a day six months before or after the real anniversary of a person's birth.
Most half-birthdays go unremarked. Perhaps the most common usage is by people whose birthday falls near Christmas, a holiday so widely celebrated that it can overwhelm private anniversaries. Young children sometimes celebrate half-birthdays if their real birthdays do not occur during the school year, so they can celebrate with friends and teachers at school.
A half-birthday is one of many unbirthdays, to use Lewis Carroll's term for any day that is not a person's real birthday.

Other definitions
Loosely, a "half-birthday" can also be a day that occurs near a person's birthday but at a much more convenient time. Someone in the United States whose real birthday occurs in November, for example, may choose to celebrate it as a "half-birthday" during the Thanksgiving holiday.
Another interpretation of "half-birthday" is that it falls on the same day of the month, six calendar months away from the real birthday. That would mean a person has no half-birthday if born on one of the following dates, because there is no correspondent date six months hence: 31 March; 31 May; 29 August (except in leap years); 30 August; 31 August; 31 October; 31 December
Retrieved from "http://en.wikipedia.org/wiki/Half-birthday"

This is all great. However, later I looked up half birthdays and found this Half-Birthday Calculator. I think it acutally splits the year in half in terms of days, not months, because it tells me that my half birthday is February 27th! What am I to do?!?!?! I guess I'm gonna have to start celebrating two half birthdays :-)