Definitely bring it up because ouch!!! But, like some of the other comments suggested, I would bring it up kindly at first because there might have been a reason. Totally worth bringing it up though because it's a big deal.

If it hurts you and you want to keep being their friend, you need to bring it up. Talk it out, explain why you are annoyed by it and give the person a chance to explain themselves. Or apologize.

Honey that is not your friend. Confront her about it and regardless her answer purposely forget her birthday when it comes up. The long game.

Oh DEFINITELY bring it up. No freakin way they should get a pass. Especially considering (not to be morbid) millions of people didn’t make it to their birthday so we should all be making a big deal and feeling blessed to make it another year around the Sun because it is!

Thanks to the pandemic, it's hard to know what day of the week it is, let along the actual day. So much in the last two years has bled together, sometimes I think it's September when it's March. Wait, it's not even March anymore. Anyway, I guess that's my point.

You are within your rights to be disappointed, but I would not try to internalize anything about her. A friend could love you deeply and still forget what day it is on the calendar.

1000000% bring it up!! Give her a chance to apologize so that you can move on together. That's a bummer. I would be hurt too

If you guys celebrate your birthdays in a big way together usually, I feel like this means there’s a reason it slipped her mind — likely, she’s dealing with something that perhaps could require a friend’s listening ear. I would try to hold off thinking the worst.

I would definitely bring it up. Especially if you usually make a big deal about birthdays. I wouldn’t automatically think it’s because she doesn’t care (although i would find that hard to do), she might have some personal things going on and this could be way for you both to open up!