Strange. Of course I'd call those that I'm close with to wish them a happy whatever day......if not cards and a gift as well. Some of my friends don't have the money to send me a gift, and I wouldn't think anything of it at all. All but 2 of my friends / family work full time, have kids and/or husbands to chase after, etc.....so I wouldn't get offended about not getting a call from them. HOWEVER it's easier to deal with maybe, because on facebook everyone sees it's my birthday that day and I'll get a hundred or so "happy birthday" notes--most just one or two lines, but that's all that's needed. I wouldn't notice otherwise.
That said, I was COMPLETELY infuriated with my dad and grandma when they threw __ fest (my kid sister's name + fest) and threw her a CARNIVAL. Yes, a CARNIVAL, and called to tell me all about it and how much they spent, but didn't acknowledge my son's birthday AT ALL (no card, no phone call, nothing). She had pony rides, a magician / balloon artist / clown, a couple dorks dressed like princesses to pass out cotton candy and trinkets and hung out by the ponies, cotton candy machine, a petting zoo, someone came and did balloon tricks, there were a couple bounce houses, dad made burgers and hotdogs for like 40 kids PLUS parents and neighbors, etc, etc. We got to hear all about it, and how much grandma spent on clothes for her. (This was her 6th birthday, because she said she'd like a carnival). Annoys me just thinking about it. But my son didn't get a phone call (nor did I; our birthdays are 3 days apart)......that made me mad. That, and the time that I was apalled to see all the JUNK in her TWO playrooms totally uncared for, not played with, strewn around everywhere, and I said "You know, you could totally donate these things you've outgrown somewhere---there are a lot of children who don't have many toys at all", and she laughed and sneered "Yeah----that's not gonna happen". My skin crawled. That is not how my mom raised my brother and I and it grossed me out.....those 2 events led me to solemnly swear I would NEVER give her a toy for ANY occasion ever. She gets homemade cards from the boys, a picture of them, and a book for all holidays, lol. I don't care. So yeah....I hold grudges. But not for busy people who just forget. Just for dad and his kid.