Why doesn't this app work for you in that scenario? Say you're in PST: put on the right hand side 11:59pm and EST --> 8:59pm that same day. Say you're in, oh

Why doesn't this app work for you in that scenario? Say you're in PST: put on the right hand side 11:59pm and EST --> 8:59pm that same day. Say you're in, oh I don't know, Nagoya: same thing on the right hand side --> 1:59pm the next day (the 5th)