🌍 World Clock
Track time across multiple time zones simultaneously. Perfect for global teams, international coordination, travel planning, and staying connected with people around the world.
Try World Clock →What is a World Clock?
A world clock displays the current time in multiple cities and time zones around the world simultaneously. Instead of calculating time differences in your head or searching for "what time is it in Tokyo?", a world clock shows you all the times you need at a glance.
Why Use a World Clock?
- Avoid Miscommunication: Never accidentally call someone at 3 AM again
- Easy Scheduling: Find overlap hours for international meetings
- Travel Planning: Know what time you'll land before you leave
- Stay Connected: Check if it's a good time to contact family abroad
Benefits
- View unlimited time zones simultaneously
- Search from 1000+ cities worldwide
- Real-time updates every second
- See date changes across international date line
- UTC/GMT offset display
- Automatic Daylight Saving Time (DST) handling
- 12-hour and 24-hour format support
- Works on all devices
Getting Started
Setting up your world clock is incredibly simple. Follow these steps to start tracking time zones:
Search for a City
Use the search box at the top of the page to find any city or country. The search is smart and flexible:
- Type a city name: "Tokyo", "Paris", "New York"
- Type a country: "Japan", "France", "USA"
- Type partial names: "Los" finds Los Angeles
- Browse popular cities if you're not sure
Add Cities to Your Clock
Click on any city in the search results to add it to your world clock. The city immediately appears in your clock list below, showing:
- City and country name
- Current local time
- Current date
- UTC offset (e.g., UTC+9, UTC-5)
View All Your Time Zones
Your world clock list displays all added cities with their current times. The times update automatically every second, so you always see accurate information.
Each city card shows the time difference from your local time, making it easy to understand at a glance.
Manage Your Cities
Remove cities you no longer need by clicking the remove (×) button on any city card. Your city list is saved in your browser, so it persists between visits.
Understanding Time Zones
Time zones can be confusing, but understanding the basics makes using a world clock much more effective.
What Are Time Zones?
The world is divided into 24 time zones, roughly corresponding to the 24 hours in a day. Each zone represents a one-hour difference from neighboring zones. This system ensures that noon (12:00 PM) occurs approximately when the sun is highest in the sky, regardless of where you are on Earth.
UTC: Universal Time Coordinated
UTC (formerly GMT - Greenwich Mean Time) is the primary time standard by which the world regulates clocks and time. It's the reference point for all time zones:
- UTC+0: London, Lisbon (when not observing DST)
- UTC+1: Paris, Berlin, Rome
- UTC+5:30: India (note: 30-minute offset!)
- UTC+9: Tokyo, Seoul
- UTC-5: New York (when not observing DST)
- UTC-8: Los Angeles (when not observing DST)
Daylight Saving Time (DST)
Many regions adjust their clocks forward by one hour in spring and back in fall. Clock7's world clock automatically handles DST transitions for all cities, so you always see the correct local time.
⚠️ DST Gotcha
Not all countries observe DST, and those that do don't always change on the same dates. For example:
- USA and Europe change on different dates
- Australia changes in opposite seasons (Southern Hemisphere)
- Japan, China, and India don't observe DST at all
This can temporarily change time differences between cities!
International Date Line
When you cross the International Date Line (roughly at 180° longitude), the date changes. This is why:
- Australia and New Zealand are often a day ahead of the Americas
- You can "gain" or "lose" a day when traveling across the Pacific
- Some island nations have unusual time zones to stay on the same date as trading partners
Key Features
Clock7's world clock is packed with features to make international coordination effortless:
Real-Time Updates
All displayed times update automatically every second. You see the live, current time in each city without needing to refresh the page. This is crucial for accurate scheduling and coordination.
Comprehensive City Database
Search from over 1,000 cities worldwide, including:
- All major world capitals and business centers
- Popular tourist destinations
- Secondary cities in major countries
- Cities with unique time zones
Smart Search
The search function is intelligent and forgiving:
- Type partial city names: "San" shows San Francisco, Santiago, San Diego
- Search by country: "Germany" shows Berlin, Munich, Hamburg
- Works with common alternate spellings
- Shows popular cities for quick access
Time Difference Display
Each city card shows the time difference from your local time:
New York: 3:00 PM (-3 hours)
London: 8:00 PM (+2 hours)
Tokyo: 4:00 AM (next day, +11 hours)
Date Display
See not just the time but also the date in each location. This is especially important when working with:
- Cities across the International Date Line
- Scheduling meetings near midnight
- Coordinating deadlines across time zones
12/24 Hour Format
Toggle between 12-hour (with AM/PM) and 24-hour format based on your preference. The setting applies to all displayed times.
Persistent Storage
Your selected cities are saved in your browser. When you return to Clock7, your world clock is already set up with all your cities, exactly as you left it.
Common Use Cases
World clocks are essential for many situations in our connected global world:
🌐 Remote Teams
Add cities where all your team members live. Before sending a message or scheduling a meeting, check if colleagues are awake and available.
💼 International Business
Track market hours across different stock exchanges. Know when your international offices are open. Schedule calls during mutually convenient hours.
✈️ Travel Planning
Check arrival times in destination cities. Plan when to call home during your trip. Avoid jet lag by understanding time differences before you leave.
👨👩👧👦 Family Abroad
Stay connected with family living in different countries. Check if it's a good time to call before dialing. Coordinate video calls that work for everyone.
🎮 Gaming Communities
Coordinate raid times with international guild members. Know when your gaming friends in other countries are online. Schedule tournaments across time zones.
📺 Live Events
Know when sporting events, concerts, or product launches happen in your time zone. Plan to watch international events live.
💱 Cryptocurrency Trading
Track trading hours across global crypto exchanges. Know when different markets open and close. Coordinate trades across time zones.
📰 Content Scheduling
Post social media content at optimal times for different audience regions. Schedule blog posts when your readers are most active.
Professional Applications
Industries that heavily rely on world clocks:
- Airlines and travel agencies
- International shipping and logistics
- Global financial services
- 24/7 customer support operations
- Media and broadcasting
- Software development with distributed teams
Time Zone Conversion
One of the most common uses for a world clock is converting times between zones for meeting scheduling.
How to Schedule International Meetings
Add All Relevant Cities
Add the cities where all meeting participants are located to your world clock.
Identify Working Hours
Look for times when all locations are within working hours. Consider:
- 9 AM - 5 PM is typically acceptable
- Lunch hours (12-1 PM) may work for some
- Early morning or late evening may be necessary for extreme differences
Check for Overlap
Find windows where it's a reasonable hour for everyone. For example:
New York: 10:00 AM ✓
London: 3:00 PM ✓
Tokyo: 11:00 PM ✗ (too late)
Los Angeles: 7:00 AM ✗ (too early)
Compromise When Necessary
Sometimes perfect overlap isn't possible. In these cases:
- Rotate meeting times to share the burden
- Record meetings for those who can't attend live
- Split into regional meetings when possible
Common Time Zone Pairs
| Location 1 | Location 2 | Time Difference | Best Meeting Window |
|---|---|---|---|
| New York | London | 5 hours | 1-4 PM NY / 6-9 PM London |
| San Francisco | Sydney | 18 hours | 5-8 PM SF / 12-3 PM Sydney (next day) |
| London | Singapore | 8 hours | 9 AM-1 PM London / 5-9 PM Singapore |
| New York | Tokyo | 14 hours | 7-9 PM NY / 9-11 AM Tokyo (next day) |
Pro Tips for Maximum Effectiveness
🗂️ Organize by Region
Mentally group your cities by region. Keep Americas together, then Europe, then Asia-Pacific. This makes scanning easier.
🎯 Add Strategic Hubs
Include major business hubs even if you don't have contacts there yet: NYC, London, Tokyo, Singapore. Useful for market hours and general reference.
⏰ Morning/Evening Reference
Learn what times represent "morning" and "evening" in key cities. This helps you quickly assess if it's appropriate to reach out.
📅 DST Awareness
Remember that time differences can change by an hour during DST transitions. Double-check meeting times during March, October-November.
🌐 Keep It Current
Remove cities you no longer need and add new ones as your contacts change. A cluttered world clock is harder to use effectively.
💻 Multiple Devices
Set up your world clock on both desktop and mobile. Your selections sync via browser storage on each device.
⚠️ Common Mistakes to Avoid
- Forgetting about DST changes (especially March and October-November)
- Not accounting for the date change across the International Date Line
- Assuming all countries in a region use the same time zone (they don't!)
- Not considering weekends and holidays in different countries
- Scheduling recurring meetings without checking DST transition dates
- Using states/provinces instead of specific cities (time zones vary within countries)
Advanced Usage
For power users:
- Meeting Window Calculator: Add 3-4 cities, then scan for times when all show business hours
- Travel Planning: Add departure and arrival cities to visualize time changes during your journey
- Market Hours: Track when major stock exchanges are open (NYC, London, Tokyo, Hong Kong)
- Event Coordination: See when a specific time (like a product launch) occurs globally
Frequently Asked Questions
How many cities can I add to my world clock?
You can add unlimited cities! However, for practical use, we recommend keeping it to 5-10 cities that you regularly need to reference. A shorter list is easier to scan quickly.
Does the world clock automatically handle Daylight Saving Time?
Yes! Clock7 automatically adjusts for DST in all cities that observe it. You always see the correct current local time, regardless of DST status.
Can I see what time it will be in another city at a specific time?
The world clock shows current time in all cities. To calculate future times, note the time difference displayed and add/subtract from your target time.
Why does the time difference between two cities sometimes change?
This happens when cities observe Daylight Saving Time on different schedules. For example, when the US changes its clocks but Europe hasn't yet (or vice versa), the time difference temporarily shifts by one hour.
Will my city list save if I close the browser?
Yes! Your selected cities are saved in your browser's local storage. They'll be there when you return, even after closing the browser or restarting your device.
Can I use the world clock offline?
Once the page is loaded, the clock will continue to display and update times even without an internet connection. However, you need an internet connection to search and add new cities.
I can't find my city. What should I do?
Try searching for the nearest major city in your time zone. Most smaller cities share a time zone with a larger nearby city. You can also search by country to see all available cities in that country.
Does it work on mobile devices?
Yes! The world clock is fully responsive and works great on smartphones and tablets. Your city selections sync through your mobile browser's storage.
How accurate is the world clock?
The world clock uses your device's system time as a reference and displays times based on official time zone data. It's accurate to within a second, assuming your device's clock is set correctly.
Can I rearrange the order of cities?
Currently, cities appear in the order you add them. To reorder, remove cities and add them back in your preferred order.
Ready to go global?
Start tracking time zones and coordinate with people around the world
Try World Clock →