World Clock — Live Time Zones

Track time across the globe with live-updating analog and digital clocks. Add cities, reorder by dragging, toggle between 12h and 24h formats, and click any clock to see it in fullscreen. Runs entirely in your browser — nothing leaves your device.

How to Use the World Clock

Add a clock — select a city from the dropdown and click "Add Clock" to display it.
Remove a clock — hover a clock card and click the X button in the top-right corner.
Drag to reorder — grab a clock card and drag it to rearrange your layout.
Fullscreen view — click the expand icon on any clock to see it enlarged, perfect for presentations.
Toggle format — switch between 12-hour (AM/PM) and 24-hour time using the toggle in the toolbar.
Day/night indicator — each clock shows a sun ☀️ or moon 🌙 icon based on the local time (6 AM to 8 PM is daytime).

Why Use a World Clock

If you work with teams across multiple time zones — or you need to coordinate meetings, flights, or deadlines — a world clock is indispensable. Instead of mentally calculating "it's 3 PM in New York, so it's 8 PM in London," you just glance at your dashboard.

This tool pre-loads five major cities (New York, London, Tokyo, Sydney, Los Angeles) and lets you add any timezone on Earth. The clocks update every second, so you always know the exact time — not an approximation.

Frequently Asked Questions

All clocks use the Intl.DateTimeFormat browser API, which automatically accounts for DST transitions. When a timezone switches between standard and daylight time, your clock adjusts instantly — no manual configuration needed.

The dropdown includes over 50 cities across all continents. If you need a timezone not listed, choose a city in the same offset (e.g., add "Bangkok" instead of "Jakarta" for UTC+7). The list covers all standard IANA timezones.

Yes — your clocks and their order are saved in your browser's local storage. When you return, you'll see the same clocks in the same arrangement.

The clocks sync to your device's system time, which is automatically synchronized via NTP (Network Time Protocol). Accuracy is typically within milliseconds. The analog clock hand sweeps smoothly using CSS animation for a realistic feel.

The sun icon ☀️ indicates daytime (6:00 AM to 7:59 PM local time), while the moon icon 🌙 indicates nighttime (8:00 PM to 5:59 AM). This gives you an instant visual sense of whether someone in that timezone is likely awake.

Use Cases

Meeting Coordination

Check time in multiple cities for meetings to find a convenient time slot that works across all participant time zones.

Stock Market Hours

Track international stock market hours across NYSE, LSE, and Tokyo exchanges for global trading activities.

Event Scheduling

Coordinate global event schedules for virtual conferences, webinars, and online community gatherings.

Server Uptime

Monitor server uptime across timezones to coordinate maintenance windows and incident response globally.

International Calls

Plan international calls by checking local times in each participant's city to avoid calling at inconvenient hours.