So this happens on both mine and my wife's iPhone 4s running 4.0.1. 1.) Open Maps. 2.) Calculate any route from your house to some location. 3.) Make sure to pick the Public Transport tab to calculate the trip via public transport. 4.) Tap the little "clock" icon that appears. 5.) Tap the "Depart...." line at the top. 6.) Try and change the time to be ONE hour ahead. When I do that, it changes the day to "Tomorrow." I have no idea. I'm unable to calculate a time for one hour ahead without the day switching to "Tomorrow." If I switch the day to "August 8" (i.e. yesterday), it then says the trip is for TODAY. How weird is that?! Again, this happens on both iPhone 4s in my house, so.... what's going on??