Time Zone Overlap Finder
Stop playing timezone Tetris. Find when everyone's actually awake and available for a meeting.
Overlap Finder Tool
The Timezone Scheduling Problem
You know that feeling when you're trying to schedule a call with colleagues in Tokyo, London, and New York? One person sends times that work for them, another replies "that's 2am for me," and the thread descends into a maze of "how about..." messages that nobody can follow.
The core problem is simple: working hours don't overlap cleanly across continents. New York's 9am is London's 2pm and Tokyo's 11pm. There's no magic time that's convenient for everyone. But there are better and worse times, and that's what this tool helps you find.
Instead of everyone guessing and negotiating, you plug in the locations and get a ranked list of times. The best options are at the top. Sometimes you'll get a "perfect overlap" where everyone's in normal working hours. Other times, you'll have to accept that someone's joining from their kitchen at 7am.
How Overlap Finding Works
Add Your Locations
Enter the cities where your team members are located. You can add up to 4 cities in the quick finder, or 8 in the full planner.
We Check Every Time Slot
Our algorithm evaluates every 30-minute slot in a 24-hour period. For each slot, we check what local time it would be for each participant.
Score Based on Convenience
Working hours (9-6) score highest. Early morning and evening score lower. Night time gets negative scores. Total scores are summed across all participants.
Rank and Display
Results are sorted by score. You see the top options with clear indicators showing which participants would be in working hours vs. early/late times.
When Overlap Just Doesn't Exist
Let's be honest: some timezone combinations are brutal. If you have team members in Sydney and San Francisco, their standard working hours have maybe one hour of overlap (early morning SF, end of day Sydney). With more than two locations across Asia, Europe, and the Americas, finding any reasonable overlap becomes nearly impossible.
Here are some strategies teams use when perfect overlap isn't possible:
- Rotate the pain: Instead of always making Tokyo join at 10pm, rotate meeting times so everyone takes turns with the inconvenient slot.
- Record everything: Make meetings optional for those in bad timezones. Record the session so they can watch and respond asynchronously.
- Split into regional calls: Have separate meetings for APAC, EMEA, and Americas, with one person attending both to bridge information.
- Go async: Replace some meetings with async video updates using tools like Loom. Not everything needs real-time discussion.
Why Use an Overlap Finder
Respects Working Hours
We don't just convert times—we evaluate whether those times are reasonable for actual humans who need sleep and have lives outside work.
Fair to Everyone
The algorithm considers all participants equally. It won't bias toward one timezone at the expense of others.
Shows What's Possible
Sometimes the best answer is "there is no good time." Knowing that upfront saves hours of back-and-forth trying to find something that doesn't exist.
Handles Complexity
DST transitions, half-hour offsets, the fact that different countries change clocks on different dates—we handle all of it so you don't have to.
Practical Tips for Global Teams
Book Recurring Meetings Carefully
A 3pm meeting might work great in January but become 4pm after DST changes. Check your recurring meetings after clock changes to make sure they still work for everyone.
Document Decisions, Not Just Discussions
If someone can't attend a meeting, they should still be able to know what was decided. Write down outcomes, action items, and decisions in a shared doc.
Respect the "Night" Label
If the overlap finder shows someone would be in "night" hours, think twice before scheduling. Regular late-night meetings lead to burnout and resentment.
Frequently Asked Questions
What exactly are "overlap hours"?
Overlap hours are the time windows when multiple timezones share reasonable working hours. For example, if your team is in New York and London, the overlap is roughly 9am-12pm New York time (2pm-5pm London). That's when both sides can meet without anyone waking up at 5am.
How does the scoring work?
We score each 30-minute slot throughout the day. Working hours (9am-6pm by default) get the highest score. Early morning and evening get lower scores. Middle of the night gets negative scores. The times shown are ranked by total score across all participants.
What if there's no good overlap?
Sometimes there isn't one—if you have team members in San Francisco and Sydney, their working hours barely overlap. We'll show you the "least bad" options, and you can decide whether to rotate meeting times to share the inconvenience or switch to async communication.
Can I customize working hours for each person?
In the full meeting planner, yes. Some people start at 7am, others prefer 10am starts. You can set individual working hours for each location to get more accurate overlap suggestions.
Does this account for Daylight Saving Time?
Yes. We use the IANA timezone database which includes all DST rules. If you're checking overlap for a date when one country has switched clocks but another hasn't, we'll show the correct times.
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