Happy belated birthday Abbeygran. I hope you found something celebratory to do with your DGS and I'm glad your DD at least phoned you. Hopefully she's planning to bring something home with her for you. Perhaps DS used to get a timely reminder from his ex-OH? Anyway, I think the idea of buying a cake, and inviting them to share it, is a great idea and will gently make the point. Plus, there's cake for you too! Birthdays are one of those things that people get worked up about - they either need it to be remembered or they don't care about it at all and wonder why other people fuss about it. I don't care at all but, at the same time, I know I'm so fortunate to usually get b'day cards from my AC. One of them usually forgets so I'm impressed if I get one from each. But, as others have said, it was YOUR birthday and, if it's important to you, your family ought to know that, and YANBU to expect a card. I hope you had acknowledgements from other family and friends, and on GN you have many good wishes at least.