There is no 9–6 overlap. Stretching to 07:00–21:00 on both sides gives you 07:00–10:15 Chicago time:
07:00 you → 17:45 Kathmandu
08:00 you → 18:45 Kathmandu
09:00 you → 19:45 Kathmandu
09:00→19:45outside Kathmandu working hours
10:00→20:45outside Kathmandu working hours
11:00→21:45outside Kathmandu working hours
12:00→22:45outside Kathmandu working hours
13:00→23:45outside Kathmandu working hours
14:00→00:45next day · outside Kathmandu working hours
15:00→01:45next day · outside Kathmandu working hours
16:00→02:45next day · outside Kathmandu working hours
17:00→03:45next day · outside Kathmandu working hours
Working hours assumed 09:00–18:00 local. Offsets include daylight saving where it applies, so this shifts through the year.