More often than not, on recieving a wedding invite, after a few polite questions, people start recalling details about their own wedding, something that may happened anytime between recent or few decades ago.
It happened when I gave my invitation to my colleuges, relatives, grandparents, bosses... you name it and they were all recalling their wedding. Whenever there was talk of the arrangements for the wedding, people used to discuss what happened in theirs, the clothes they wore and the gifts they received.
A gang of us went to greet the new bride in the neighbourhood. We asked about photographs- out of politeness. There it came out, a preserved, 25 year old album of the parents wedding because the son's wedding album had not yet come!