If I am being unreasonable then I am willing to be told so (before we start!).
A mum I know from the school gates is beside herself because her pfb who is 12 has gone on a school residential trip for 2 days/3nights and it's her birthday inbetween. She is positively maudlin about it. She even told her dd how sad she would be. Now she is moping around on facebook with random status updates about how awful it all is.
My perspective of it would be, ok my dd is not going to be here on her birthday and that's disappointing but she will be having a fantastic time with her mates and we will do lots of celebrating at the weekend and have a birthday party etc. This woman's dd is very popular amongst her peers, so thankfully will probably not be wallowing like her mother.
What would your take on it be?