How to Find Overlapping Work Hours for Global Remote Teams

When your team spans New York, London, Tokyo, and Singapore, there is no single 'business hours' window that works for everyone. The overlap between working hours across four time zones may be as small as 0–2 hours per day — or non-existent in extreme cases.

The most common mistake is scheduling meetings based on the organizer's local timezone without checking what time it translates to in each participant's city. A 9:00 AM meeting in San Francisco is midnight in Tokyo.

To find overlapping work hours, you need to convert each city's standard work hours (e.g., 9:00 AM–6:00 PM) into UTC, then find the intersection of all those UTC windows.

For example: Tokyo (UTC+9) 9:00 AM–6:00 PM = UTC 00:00–09:00. New York (UTC-4 in EDT) 9:00 AM–6:00 PM = UTC 13:00–22:00. These two windows have zero overlap — making synchronous meetings nearly impossible without one team working outside normal hours.

Instead of manually converting time zones, our free Time Zone Overlap Finder automatically calculates the common working window for up to 10 cities simultaneously. Enter each team member's city, and the tool highlights the best meeting slots in green.

This is especially valuable when coordinating across Daylight Saving Time (DST) boundaries, where the same UTC offset can shift by 1 hour depending on the season.