My ds' birthday is soon and out of all the invites I have sent out, only 1/4 of the parents have replied on a RSVP invite. I honestly do need to know the yes/no (this weekend is cutoff point for this), so why don't people show that common courtesy and reply? I am getting real upset with this. We have booked a venue based on numbers invited as one needs to do so well in advance for this venue, it is a excellent setup and perfect for the age group, the down side it is later in the day so I do understand that some will not be OK with the time and have taken this into account not expecting everyone to come. AIBU to give a careful reminder on the schools FB page as there is that many that haven't given a reply? Or other suggestions, I will admit I do not know loads of the parents but we get along with small chit chat and such but I feel foolish being forced to hunt out parents in the school yard to get replies when it's that many. Helpful advice or stories on how to solve this is welcome. Never done such a big birthday before so I am worried.