Panama City is 6 hours behind Geneva
Best overlap: 2:00 PM to 6:00 PM in Geneva is 8:00 AM to 12:00 PM in Panama City.
2:00 PM to 6:00 PM in Geneva is when Panama City is also working, at 8:00 AM to 12:00 PM their time. Roughly 4 hours of common time means scheduling is manageable; just avoid the very edges of the window. Just remember Geneva changes its clocks for daylight saving and Panama City doesn't, so confirm the overlap whenever the seasons turn.