Scheduling across continents usually means someone takes a call at a bad hour. These pages do the hard part for you: for each popular city pair, Timezio overlays both teams’ standard 9-to-5 day and lists the hours when everyone is awake and working, plus a recommended slot in the middle of that window. Because the math uses official IANA data, the overlap stays correct even when one city changes its clocks and the other doesn’t.
Pick a pair below for an instant answer, or open the Meeting Planner to add your own cities, adjust each participant’s working hours, and generate calendar invites. To double-check the raw time difference first, use Compare.