Default Clocks
Custom Clocks
Add Custom Clock
About World Clock
Our World Clock tool displays current time in multiple timezones simultaneously. Add custom timezone clocks to track time differences across different regions around the world. All operations happen in your browser - no data is sent to any server.
Key Features
- Real-time Updates: All clocks update automatically every second
- Default Clocks: UTC, New York, and Tokyo shown by default
- Custom Timezones: Add unlimited custom clocks for any timezone
- 40+ Timezones: Choose from major cities worldwide
- UTC Offset Display: See time difference from UTC at a glance
- Persistent Storage: Custom clocks saved in your browser
- Easy Management: Remove custom clocks with one click
- 100% Client-Side: Complete privacy and security
How to Use
- View Default Clocks: See current time in UTC, New York, and Tokyo
- Add Custom Clock: Enter a location name and select timezone from the dropdown
- Track Time Differences: Each clock shows UTC offset for easy comparison
- Remove Clocks: Click "Remove" button on any custom clock to delete it
Common Timezones Reference
- UTC: Coordinated Universal Time (GMT+0)
- EST/EDT: Eastern Time (GMT-5/-4) - New York, Toronto
- PST/PDT: Pacific Time (GMT-8/-7) - Los Angeles, Vancouver
- CET/CEST: Central European (GMT+1/+2) - Paris, Berlin
- JST: Japan Standard Time (GMT+9) - Tokyo, Osaka
- AEST: Australian Eastern (GMT+10/+11) - Sydney, Melbourne
- IST: India Standard Time (GMT+5:30) - New Delhi, Mumbai
- GMT: Greenwich Mean Time (GMT+0) - London
Privacy & Security
All clock operations are performed entirely in your browser using JavaScript. No data is sent to any server. Your custom clocks are stored locally using browser localStorage and remain completely private on your device.