Marketing · Tool
Time Zone Overlap Planner
Compare time zones and visualize shared working hours.
No common working hour across the selected zones. Try widening the working window or removing the most extreme time zone.
| Zone | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UTC hour → | |||||||||||||||||||||||||
San Francisco America/Los_Angeles | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | |
New York America/New_York | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | |
London Europe/London | 01 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | |
Berlin Europe/Berlin | 02 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | |
Numbers are local hours in each zone for today's UTC reference day. Adjust working hours above to expand or shrink the overlap band.
What is Time Zone Overlap Planner
Scheduling a global campaign launch or a cross-team standup? Add every time zone you care about and see a clear 24-hour grid with the shared working window highlighted, so you know exactly when everyone is awake and available.
The Time Zone Overlap Planner shows multiple time zones aligned on a 24-hour grid with the shared working-hours window highlighted. Add cities or named time zones, set a working-hours range, and read the overlap visually instead of doing the mental math.
Time zone arithmetic is browser-native: the tool uses the Intl API for accurate conversions, including current daylight-saving offsets for every supported region.
It's built for cross-functional marketing teams operating across regions, campaign managers coordinating a synchronized global launch time, and anyone scheduling recurring meetings that need to land inside more than one team's working day.
How to use Time Zone Overlap Planner
- 1Set the working hours window you want to enforce.
- 2Add every city or time zone you need to coordinate.
- 3Read the highlighted shared overlap band on the grid.
- 4Widen the working window or remove the most extreme zone if no overlap exists.
Why Time Zone Overlap Planner matters
Distributed teams that don't formalize their overlap windows pay a recurring tax of mistimed meetings, delayed launches, and async handoffs that arrive at midnight. The planner makes the trade-offs visible so a scheduling decision becomes a one-minute call rather than a recurring negotiation.
Globally coordinated launches — paid media starts, product announcements, partner reveals — depend on a precise shared time. Using a single planner as the source of truth, and converting it into every team's local time before publishing the run-of-show, prevents the kind of last-minute confusion that derails launches.
Time Zone Overlap Planner use cases
Picking a recurring all-hands time across three regions
Add representative cities for each region, set everyone's preferred working hours, and look for the largest overlap band. Pick a recurring time inside that band so no team ever joins outside their working day.
Coordinating a synchronized global campaign launch
Pin a single UTC moment for the launch and use the planner to translate it into local time for each market team. Each team gets a clear handoff time without ambiguity about which date or hour applies to them.
Booking an interview or client call across borders
Add your time zone and the other party's, set realistic working hours, and propose a window that lands cleanly in both. Saves a round-trip of 'how about 4 PM your time?' messaging.
Scheduling email and ad sends for peak local engagement
Use the grid to confirm that a scheduled send leaves your hub during your team's working hours but lands in the recipient's morning, not the middle of their night.
Example
San Francisco, New York, London, and Berlin with a 9–17 working window share roughly two hours of overlap each day — narrow but workable for a quick sync.
FAQ
- How are working hours defined?
- You set a 24-hour-clock window (e.g. 9 to 17). The tool checks each UTC hour to see whether every selected zone is inside that window in local time.
- Does it account for daylight saving?
- Yes — conversions use the IANA time zone database, which includes current DST rules for each region.
- Can I share the configured plan?
- Yes — copy the share link to send your selected zones and working window to a teammate. Opening it restores the same view.