World Time Zone Converter
World Time Zone Converter Guide
The world time zone converter supports real-time conversion across 200+ city time zones. It uses the IANA time zone database, handles DST changes automatically, and provides accurate time conversion for global business, remote collaboration, and travel planning.
Key features
🌍 Global time zone coverage
Supports major city time zones across Asia, Europe, the Americas, Oceania, and Africa.
- Asia：Beijing、Tokyo、Seoul、Singapore、Mumbai、Dubai、Riyadh、Abu Dhabi and more
- Europe：London, Paris, Berlin, Moscow, Stockholm, and more
- Americas：New York、Los Angeles、Chicago、Toronto、Sao Paulo、Rio de Janeiro、Brasilia and more
- Oceania：Sydney、Melbourne、Auckland and more
⏰ Accurate live conversion
Uses the browser native time zone API for accurate real-time conversion.
- Live time sync，Updates every second
- Handles DST changes automatically
- Supports historical time conversion
- Second-level time display
🎯 Smart interaction design
A clean, direct interface that works with zero configuration and provides useful interactions.
- Ready to use, no setup required
- Smart business-hour highlighting
- Copy time results with one click
- 12/2412/24-hour toggle
📱 Responsive design
Works on desktop, tablet, and mobile devices.
- Desktop: multi-column grid
- Tablet: adaptive columns
- Mobile: compact single column
- Touch-friendly interactions
How to use
Choose source time
Shows the current time by default. You can also choose a specific time with the date picker, or type a timestamp/date string.
Choose source time zone
The system detects your local time zone automatically, and you can choose another source time zone manually.
View conversion result
The system displays converted results for major global time zones, highlights business hours, and lets you click any time to copy it.
Time zone basics
Time zone(Time Zone)divides the earth into 24 longitudinal regions. Each time zone spans about 15 degrees and differs by one hour.DST(Daylight Saving Time, DST)is a system used in some countries and regions where clocks move forward by one hour during summer.
Major time zone notes
UTC (Coordinated Universal Time)
The international time baseline, independent of location, and the foundation for global time calculation.
CST (China Standard Time)
UTC+8，Used across mainland China, Taiwan, Hong Kong, and Macau, with no daylight saving time.
EST/EDT (US Eastern Time)
UTC-5 standard time and UTC-4 during daylight saving time, used by New York, Washington, and other East Coast cities.
GMT/BST (UK Time)
GreenwichUTC+0 standard time and UTC+1 during daylight saving time, used by London and nearby regions.
DST notes
Daylight saving time is used in some countries during summer. Clocks usually move forward by one hour in spring and return to standard time in autumn.
- Regions：North America and much of Europe
- Transition time：Usually early Sunday morning
- Impact：Affects UTC offsets and needs special care
- Indicator：This tool shows DST labels automatically
Use cases
🏢 Business collaboration
Schedule international meetings, coordinate global team hours, and set delivery times
✈️ Travel planning
Calculate flight times, plan itineraries, avoid time-zone confusion, and book hotels or activities
💻 Software development
Build multi-time-zone apps, debug time-related features, and deploy global services
📺 Live event viewing
Find international livestream times, sports events, and online meeting times