World Clock
Add the time zones you need and see them lined up hour by hour, with overlapping daytime hours highlighted automatically.
Overview
A single From/To conversion answers one question at a time. Scheduling across several time zones at once is a different problem — you need to see everyone's day laid out together to spot the hours that actually work for the whole group. This tool keeps every saved time zone on one shared, scrollable timeline: click any hour in any zone and every other zone lines up on that exact same moment, so you can read off local times and daytime/night hours for the whole group at a glance instead of converting one pair at a time.
Examples & Sample Data
Comparing three zones for a meeting
Add New York, London, and Mumbai
10:00 AM in New York lines up with 3:00 PM in London and 7:30 PM in Mumbai — all shown as daytime hours
How It Works
- Your own time zone is detected automatically and added as the first row.
- Type a city or time zone name in the "+ Place or timezone" box and pick one to add it.
- Scroll the grid, or use the date strip at the top, to move through the days.
- Click any hour cell in any row to line up that exact moment across every zone.
- Read the color-banded cells and the summary line below the grid to see which hours are daytime for everyone.
Common Use Cases
Scheduling international meetings
Find a meeting time that falls in reasonable working hours for every participant's time zone at once, not just one pair at a time.
Coordinating with a remote team
Keep a standing view of teammates' local time so you know when they're likely online before messaging or calling.
Planning calls with family or friends abroad
See at a glance when it's a reasonable hour to call, without doing the offset math yourself.
Tips & Best Practices
- Zones are saved in your browser, so your list is exactly as you left it next time — nothing is sent to a server.
- You can add up to 8 zones before the grid gets too cramped to read comfortably.
Frequently Asked Questions
No. Everything, including your saved time zones, runs entirely in your browser using JavaScript's built-in time zone database, and your zone list is stored only in your browser's local storage.
Time Zone Converter answers one From → To conversion for a single moment. World Clock shows several time zones at once on a shared, scrollable timeline, so you can see overlapping daytime hours across all of them together — better suited to finding a meeting time that works for a group.
No. Every cell also shows the actual local hour as a number, and the summary line below the grid states in plain text how many of your zones are in daytime hours for the currently selected time.
Yes — each zone's offset and hour labels are computed for the actual date shown, using the browser's built-in time zone database, so a zone that observes daylight saving shows the correct hours whichever side of the transition you're looking at.
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