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Free Timezone Overlap Visualizer

SyncZones helps remote teams find shared working hours across up to 5 time zones instantly. Visualize timezone overlap, click any hour to copy meeting times, and share one link with your whole team — no sign-up needed.

Quick Tips:

  • Click any timezone name to rename it to a person or team (e.g., "Sarah").
  • Click any hour block in the timeline to instantly copy the meeting times to your clipboard.
  • Use Save Team to remember your core zones for next time on this device.

Want deeper help? Read our corridor and scheduling guides in the SyncZones blog, including practical playbooks for New York ↔ Lagos, US ↔ Europe during DST season, and a comparison of the main timezone overlap tools for remote teams.

Overlap Visualizer

Business Hours (9 AM - 5 PM)

What is timezone overlap?

Timezone overlap is the window of time when two or more distributed teams are simultaneously within their standard working hours. For example, a team in London (GMT) and a team in New York (EST) share roughly 9 AM–1 PM GMT as mutual business hours. SyncZones visualizes this window instantly — so you can pick a meeting time that is fair for everyone, not just one side.

How SyncZones works

Add up to 5 time zones — search by city name or IANA identifier. Rename each zone to a team member or city. The overlap visualizer highlights shared business hours (9 AM–5 PM) across all zones. Click any hour block to copy that moment's local times to your clipboard. Hit Copy Share Link to get a URL that opens the exact same view for anyone on your team.

Frequently asked questions

How many time zones can I compare?

SyncZones supports up to 5 simultaneous time zones. You can search for any city or IANA timezone (e.g., "Tokyo" or "America/Chicago"), rename each zone to a person or team, and instantly see shared working-hour overlap for the whole group.

How do I share my team's timezone setup?

Click Copy Share Link. SyncZones encodes your entire team setup — all time zones, custom names, and selected date — into a single URL. Paste it in Slack, a calendar invite, or email and everyone sees the exact same view.

Does SyncZones handle Daylight Saving Time automatically?

Yes. SyncZones uses your browser's built-in Intl API with full IANA timezone support, so DST transitions are handled automatically. Change the date in the date picker to see how your overlap window shifts during transitions — useful for planning ahead around the March and November DST switches.

Is SyncZones free? Do I need to create an account?

SyncZones is completely free with no account or sign-up required. Your timezone setup is stored in the URL (for sharing) and optionally in your browser's local storage via Save Team — nothing is sent to any server.

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