I mean, I know I'm 40 so AIBU to be upset about it? I have three kids, one of whom is only a few months old, so I won't be going away on holiday, was hoping for a family meal to celebrate. They said it can wait til they're back from holiday, ten days afterwards.
They also did this on my 30th birthday, which was shit. DH is the worst person in the world at organising anything, so can 100% rely on him to not bother. To make matters worse, my birthday is a Monday, and the weekend before DH will be away on business.
It's still three months away, but I am already pissed off.