I have a terrible time remembering birthdays, I am a bit of the family joke. Love all my siblings, just never remember to call/send card. For my boys (now 18 & 23), I've always had an informal get together. Never send written invites, do call the in laws. Sometimes they come, sometimes not. They still love the boys, but I am grateful that the kids are self confident enough that they don't need a card or gift to know they are loved. They have also learned that if you want someone to come somewhere or do something with you, you had better organise it ahead of time
. Taking charge of their own happiness, makes me very proud!