Santiago is 8 hours behind Karachi
Best overlap: 4:00 PM to 6:00 PM in Karachi is 8:00 AM to 10:00 AM in Santiago.
Target 4:00 PM to 6:00 PM in Karachi, which lands at 8:00 AM to 10:00 AM for the Santiago side. With only around 2 hours of shared time, be precise — book 4:00 PM in Karachi (8:00 AM in Santiago) and you'll catch both teams. For part of the year the maths changes: Santiago observes daylight saving, Karachi does not, shifting the overlap by an hour.