Really, the "it's both ends of the week" thing? When Americans say "how was your weekend" do they really just mean either Saturday or Sunday? Or do they alterna

Really, the "it's both ends of the week" thing? When Americans say "how was your weekend" do they really just mean either Saturday or Sunday? Or do they alternatively say "how were your weekends?", referring to both ends? I suspect the common response to the first is still a list of things you did on both Saturday and Sunday, even in the US.