Philadelphia is 6 hours behind Johannesburg
Best overlap: 2:00 PM to 6:00 PM in Johannesburg is 8:00 AM to 12:00 PM in Philadelphia.
For a call that suits both sides, look at 2:00 PM to 6:00 PM in Johannesburg / 8:00 AM to 12:00 PM in Philadelphia. Philadelphia is 6 hours behind Johannesburg, leaving about 4 hours of daily overlap — enough for most meetings if you don't leave them too late in the day. Keep an eye on the calendar — Philadelphia observes daylight saving and Johannesburg doesn't, which nudges this window by an hour twice a year.