Working Hours Time Zone Converter: Find Overlap Windows

Start with the cities that actually matter

Use city names instead of fixed offsets or abbreviations. Los Angeles, New York, London, Berlin, Dubai, Singapore, and Sydney carry local daylight saving rules, while labels like PST, EST, CST, or IST can be ambiguous.

For a fast first pass, open the world clock online and add the cities your team uses most often. Current local context makes it easier to spot whether someone is near lunch, end of day, or already on tomorrow's date.

Define the working-hours window

Most teams start with 9:00 AM to 5:00 PM local time, but a smaller core window is usually kinder for recurring meetings. Try 10:00 AM to 4:00 PM for normal collaboration, then allow edge slots only when the meeting is urgent or the inconvenience rotates.

If the group spans the Americas, Europe, and Asia-Pacific, there may be no perfect shared window. In that case, use the business hours across time zones guide to decide when a rotating schedule is fairer than forcing one region into every late call.

Compare overlap on the exact date

Move from clocks into the meeting planner time zones tool once the cities and working-hours rules are clear. Choose the meeting date first, then scan the overlap bands across all locations.

The date matters because daylight saving time does not change everywhere at once. A Tuesday overlap that works this week can shift by an hour during clock-change weeks, especially for teams split between North America, Europe, and regions that do not observe DST.

Use a simple scoring rule

• Strong window: everyone is inside the normal working-hours range.
• Usable window: one region is near the edge, but not before 8:00 AM or after 7:00 PM.
• Rotation window: the meeting is recurring and the inconvenient slot alternates by region.

For more detail, compare your shortlist against the meeting time zone overlap workflow and the older overlapping working hours template.

Confirm the final local times

After picking a slot, verify it in the time zone converter. This final check catches AM/PM mistakes, next-day labels, and daylight saving edge cases before the calendar invite goes out.

A clear invite lists the important local times in one line. For example: Tuesday 9:00 AM Los Angeles / 12:00 PM New York / 5:00 PM London / Wednesday 12:00 AM Singapore.

Related guides

• Time zone converter and world clock online
• Business hours across time zones
• Meeting time zone overlap
• Time zone converter, world clock, and meeting planner workflow
• Compare world clock time zones online