Shouldn't age be established by achievement and developmental milestones? Rather than biological life stages? Just because days pass on by does not prove we've really become older, because being older suggests being more developed and mature than the previous stage.
Personally I think time is finally catching up with me. Always pegged an old soul and mature for my age, things are slowing down and mellowing out. Maturation halted. After moving through life experience at warp speed time ticks sluggishly in the clock of personal progress and I stay the same. Well, may hair doesn't. I tend to change a hair a lot. But I hardly think that should grant me a new numerical value.
I've still got a good 6 months to go, so you know, a lot can happen. Maybe I will move an inch or so. Otherwise my twin brother is going to turn a year older than I.