I'm the eldest of her kids and she admits she has no idea when my birthday is despite knowing when my brothers is, his girlfriends is and even his girlfriends mothers....
She doesn't seem to know (or care) when my DSs (her only grandchild) or DHs is either even if I remind her regularly up to the events.
She's never been great at the 'mum stuff' and I know I should have got used to it by now but it still makes me sad when another birthday rolls round and she doesn't even acknowledge it. (I'm not looking for cards or gifts just an acknowledgement would be nice) 