If one is speaking with friends at 1 AM, Wednesday -- much more accurately, then, Thursday, as even explicitly stated in the conversation  -- and the suggestion is for the outing to take place "tomorrow", then logically is not the outing to occur on Friday?   

People.    

Now I get to spend both days -- and probably the rest of the goddamn summer, as one of those vital friends is departing on vacation -- completely alone (yes, my social pyramid is exactly that frail). A season wasted, wasted ...