So due to some unforeseen circumstances with our venue (who "accidentally" double booked their venue for our original date) my fiancé and I are having to postpone our wedding. Our wedding date was originally September 3, and with a month to go there's no way we can find somewhere else! We will need to postpone until May of 2017. Our parents will understand, but we had several guests coming to the States from Australia.
My question is, how to I tastefully and tactfully tell our guests that the wedding has been postponed?