fred rosenberger wrote:I actually HAVE been known to wish people "happy birthday" on random days, not knowing when their birthday is. When people wish me a happy birthday, I often reply "Happy Birthday to you as well!!!".
We have a custom in the Netherlands that we wish "happy birthday" to the close relatives of the "birthday victim". For example if my daughter has her birthday, some people would say to me: "happy birthday with your daughter". It is not that much said, not a custom everywhere, but you can say that without people looking surprised.