Same here, ten years since I left, and its a little bit puzzling for my college-era friends and for my girlfriend (we've been together 9 years and counting). The days before my birthday I go from full "birthday negationism" to enjoy my cake at the end hahaha.
But what hurt me most, I that my mom is not a born in, so after she left the Borg, automatically restored her ways around holidays and birthdays and sometimes get mad at me for "forgetting her birthday", but it's like, "Hey, YOU RAISED ME LIKE THIS! I have no clue to my extended family dates anyway...