World Meeting Scheduler
Find the best meeting time that works across two time zones by checking how much working-hours overlap remains after accounting for the time difference. Use it when scheduling calls between international colleagues or clients.
About this calculator
When two people work standard hours in different time zones, only a portion of their working days align. The calculator converts both schedules into a common reference by measuring the UTC offset difference (tzDiff = |timezone1 − timezone2|). The overlap window starts at max(workStart, workStart + tzDiff) and ends at min(workEnd, workEnd − tzDiff). Available meeting slots = max(0, overlapEnd − overlapStart − meetingDuration). A positive result means a feasible window exists; zero means no common working time is available. This helps distributed teams avoid scheduling calls outside anyone's office hours without complex manual timezone math.
How to use
Suppose Team A is UTC+0 (timezone1 = 0) and Team B is UTC+5 (timezone2 = 5), both work 9:00–17:00, and the meeting is 1 hour. tzDiff = |0 − 5| = 5. overlapStart = max(9, 9+5) = 14. overlapEnd = min(17, 17−5) = 12. Available slots = max(0, 12 − 14 − 1) = max(0, −3) = 0. No overlap exists. Try UTC+2 vs UTC+5: tzDiff = 3, overlapStart = max(9,12) = 12, overlapEnd = min(17,14) = 14. Slots = max(0, 14−12−1) = 1 hour of availability.
Frequently asked questions
How do I find a meeting time that works across multiple time zones?
Start by identifying the UTC offset of each participant's location. Then determine the overlapping window where all parties are within their working hours. Tools like this calculator automate that comparison so you can instantly see whether a feasible slot exists. If no overlap is found, consider adjusting working-hour boundaries or shortening the meeting duration.
What happens when there is no working-hours overlap between two time zones?
When the time difference exceeds the length of the shared working day, the overlap window becomes negative, meaning no mutually convenient slot exists within standard hours. In that case, at least one party must meet outside their normal working hours. Some teams adopt a rotating 'off-hours' policy so the burden is shared fairly across time zones.
Why does traveling east make time zone scheduling harder than traveling west?
Eastward travel compresses your forward overlap with colleagues back home because you are already far ahead in the day. Westward travel pushes you earlier, which can preserve more afternoon overlap with eastern counterparts. The same principle applies to distributed teams: a large eastward offset between two offices tends to leave less shared daytime than a comparable westward one.