"the weather or red sky at night."
Being a somewhat inept (http://CarlAdler.org/waterlogged.html) but enthusiastic sailor I can testify that the "red sky at night sailors delight ... " is true and is based on the fact that weather moves from west to east. Even a NorthEaster comes from the west (unless it is the "Perfect Storm" which did turn around and move east to west.) What I think is interesting is the question "Who is first recorded as using this expression?" I think the answer is surprising.