Just found out my son who is in reception is doing an assembly week and parents can go and watch. He was really excited about me coming. But I can’t go because I have to work. I could have booked it off but a client meeting has been scheduled for then and can’t be moved now. If we had more notice this wouldn’t have been an issue. They normally put things in the calendar at the beginning of the year but this wasn’t there. AIBU to feel sad I can’t go because of the short notice?