World Clock
View multiple time zones simultaneously. Perfect for global teams and international coordination.
World Clock
Add City
What is the World Clock?
The World Clock is a professional tool for simultaneously displaying multiple time zones. Unlike simple world time clocks, this tool offers real-time synchronization, automatic daylight saving time adjustments, time difference calculations, and an extensive database with hundreds of cities worldwide. Ideal for global teams, international business relationships, and personal contacts around the globe.
The tool not only calculates the current time in different time zones, but also visually shows the time of day (day, night, twilight) of each region. You can see at a glance whether it's deep night in Tokyo, early morning in New York, or midday in London. This visual representation helps choose respectful times for international calls or meetings.
Particularly valuable for remote workers in distributed teams, freelancers with international clients, project managers of global projects, or families with relatives in different countries. The clocks update automatically in real-time and consider all time changes (Daylight Saving Time) – no manual adjustment needed.
How does the World Clock work?
1. Add Cities
Click "Add City" or the plus symbol and choose from the extensive city database. The list contains all major metropolises and capitals worldwide, sorted by continents and countries. Use the search function to quickly find specific cities. You can display as many clocks simultaneously as you want – no limits.
2. Understand Time Differences
Each clock shows the time difference to your local time (e.g., "+8 hours" or "-5 hours"). This information is critical for meeting planning: If it's 2:00 PM for you and Tokyo shows "+7 hours", it's 9:00 PM there – possibly too late for a business call. The difference updates automatically during time changes.
3. Use Time-of-Day Indicators
The visual indicators (sun, moon, twilight) show at a glance what time of day it is at each location. Yellow sun = day (approx. 9 AM-5 PM), orange twilight = early morning/late evening (6-9 AM, 5-8 PM), blue moon = night (8 PM-6 AM). These symbols help avoid inappropriate contact times.
4. Organize and Manage Clocks
Arrange clocks via drag & drop in the desired order. Group e.g., all team locations at the top, customer time zones in the middle, family at the bottom. Remove no longer needed clocks with the X button. Your selection is saved locally and remains on the next visit.
Practical Use Cases
Remote Teams & Distributed Work
Add all locations of your team members. When planning stand-ups or all-hands meetings, you immediately see which times are acceptable for everyone. Avoid contacting colleagues in the middle of the night. The visual representation makes time zone management intuitive, even for globally inexperienced teams.
International Customers & Sales
Sales teams with global customers can identify optimal call times. If you're based in Europe and have Asian as well as American customers, the World Clock shows overlapping working hours. Schedule demos and calls at times that fall during regular business hours for both sides.
Long-Distance Relationships & Family Abroad
When family members or partners live in different countries, the World Clock helps find good times for video calls. Add all relevant time zones and develop a sense of when the other person is available. Especially useful with large time differences (12+ hours).
Event Coordination & Launches
For global product launches, live events, or coordinated marketing campaigns, all time zones must be perfectly synchronized. The World Clock helps find the optimal launch time that works for all major markets, or coordinate different regional launch times.
Travel Planning & Jetlag Management
Before international trips, you can mentally prepare for the destination time zone. Compare your current time with the destination and plan arrival time, first meetings, or check-ins. The visualization helps better anticipate jetlag effects.
Frequently Asked Questions (FAQ)
Are daylight saving time changes automatically considered?
Yes, the tool uses your browser's time zone database, which knows all Daylight Saving Time (DST) rules. If, for example, clocks change in the USA while there's no change yet in Europe, the World Clock automatically shows the correct, current time differences. No manual adjustment required.
How current are the displayed times?
The clocks update every second in real-time. They use your computer/smartphone's system time, which is normally automatically synchronized via NTP (Network Time Protocol). The accuracy corresponds to the accuracy of your device clock – typically accurate to a few seconds.
What do the symbols (sun, moon) mean?
Sun (yellow) = typical business hours/daylight (approx. 9 AM-5 PM), Twilight (orange) = early morning or evening hours (6-9 AM, 5-8 PM), Moon (blue) = nighttime (8 PM-6 AM). This categorization is general – doesn't consider individual working hours or cultural differences. Use them as a guideline.
Can I save my city selection?
Yes, all added cities and their order are automatically saved locally in browser storage (LocalStorage). When you reopen the page, your clocks are still there. If you clear your browser cache, you must add the cities again.
How many clocks can I display simultaneously?
There's no technical upper limit. Practically, however, we recommend 5-15 clocks for optimal clarity. Too many clocks make quick comprehension difficult. Focus on the actually relevant time zones for your daily life or current projects.
Why isn't my city in the list?
The database contains all larger cities and capitals worldwide, but not every small town. If your city is missing, choose the nearest larger city in the same time zone – the displayed time will be identical. Example: Instead of "Düsseldorf" you can choose "Berlin" (both UTC+1).
Does the World Clock work offline?
Yes, after the first load, the World Clock works completely offline. Time calculations happen locally in your browser, no server requests are needed. Only the initial page load requires an internet connection.
Can I sync the World Clock across multiple devices?
No, there's no cloud synchronization. Each device stores its city selection separately in the local browser. This protects your privacy – the tool cannot see which time zones you're watching. You must add the cities manually on each device.
Is my data stored or tracked anywhere?
No, absolutely not. Your city selection remains exclusively local in your browser. There's no server communication, no tracking, no analytics. Nobody can see which time zones you use – not even us. 100% GDPR compliant by design.
Privacy Guarantee
- ✓ All city selections are stored only locally
- ✓ No time zone data leaves your browser
- ✓ Time calculations occur completely client-side
- ✓ No tracking of which time zones you watch
- ✓ No account registration required
- ✓ 100% GDPR/DSGVO compliant by design