World ClockView the current time in multiple cities and timezones around the world simultaneously.
World Clock
View the current time in multiple cities and timezones around the world simultaneously.
View Clocks
See the current time in your pre-selected cities.
Add Cities
Search and add cities from the list of 24+ global locations.
Manage Display
Remove cities you don't need and arrange your personal world clock.
What Is World Clock?
The World Clock displays the current local time in multiple cities simultaneously, updating every second. Choose from over 24 major cities spanning all time zones, and see each city's current time, date, UTC offset, and whether it's currently day or night. The tool uses the browser's native Intl.DateTimeFormat API for accurate timezone conversions that automatically handle Daylight Saving Time transitions. You can add and remove cities to create a personalized world clock dashboard. Each city card shows its country flag, local time in 12-hour format, the current date, and a sun/moon icon indicating day or night status. This is essential for anyone working with international teams, managing global operations, or planning calls across time zones.
Why Use Our World Clock?
- Live-updating times across 24+ major cities
- Automatic DST handling via Intl.DateTimeFormat
- Day/night indicators for each location
- Searchable city list for quick additions
- Clean card-based layout that's easy to scan
- No API keys or external services required
Common Use Cases
Remote Team Coordination
See at a glance what time it is for each team member's location.
International Business
Check if a client's office is open before making a call.
Travel Planning
Monitor time at your destination before and during travel.
Trading Hours
Track which financial markets are currently open based on local time.
Family Abroad
Know the right time to call family members in different countries.
Technical Guide
The World Clock leverages the Intl.DateTimeFormat API with the timeZone option to convert the current Date to each city's local time. A useEffect with a 1-second setInterval updates the shared "now" state, triggering re-renders across all city cards. The day/night determination uses a simple 6 AM to 6 PM check on the local hour. UTC offsets are extracted from the formatToParts() method with the "shortOffset" timeZoneName style. The city list uses IANA timezone identifiers (e.g., "America/New_York", "Asia/Tokyo") which are standardized and built into every modern browser. The search functionality filters cities by name using a case-insensitive string match.
Tips & Best Practices
- 1Start with your most frequently contacted timezones
- 2The day/night icon helps you avoid calling during unsociable hours
- 3Use this alongside the Meeting Time Finder for scheduling across zones
- 4All times automatically adjust for Daylight Saving Time
- 5Remove unused cities to reduce visual clutter
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Date & TimeFrequently Asked Questions
QAre the times accurate?
QDoes it adjust for Daylight Saving Time?
QHow many cities can I display?
QCan I add custom timezones?
QWhat does the sun/moon icon mean?
About World Clock
World Clock is a free online tool from FreeToolkit.ai. All processing happens directly in your browser — your data never leaves your device. No registration required. No ads. Just fast, reliable tools.