Is it Weird That I Forget My Age?

Usually, about 3 or 4 months before my actual birthday, I unconsciously start referring to myself as the new age. Why is that? 

It's not that I'm trying to sound older or anything. It just happens. Like, this year- somehow, I turned 23 in my mind at least a month ago. My body clock... Or body calendar... Is waaaay out of whack.

In other news, my birthday is on Mayday, people :) Same day every year. 

And yes, THAT is a particular phenomenon that I understand, thank you very much!