World Clock: View Time Zones & Multiple Cities Online
World clock online: view current time across multiple cities and time zones, with seconds display, DST awareness, and 24-hour formats.
Updated 2026-08-16
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Features
- View current time in 100+ major cities worldwide organized by region
- Real-time clock updates every second with automatic synchronization
- Cities grouped by geographic regions: Asia, Europe, Africa, Americas, Oceania
- Time zone comparison showing UTC offset for each city
- Daylight saving time (DST) detection and automatic adjustment
- 12/24 hour format toggle for different display preferences
- Sorted by time zone within each region for easy comparison
- Quick visual scan of global working hours across all major business hubs
- Perfect for remote teams coordinating across continents
- No server dependency: all timekeeping uses your device's system clock
How to Use
- 1Cities are automatically displayed grouped by geographic region.
- 2Toggle between 12-hour and 24-hour format using the button in the top right.
- 3Compare times across cities in the same region to find overlapping working hours.
- 4DST indicator shows when daylight saving time is active.
- 5Use the regional grouping to quickly assess time differences between business hubs like New York, London, and Tokyo.
- 6Check the UTC offset column to understand each city's time zone relative to your own.
- 7Plan international calls by finding hours when two regions overlap during standard business times (9 AM-5 PM).
- 8Monitor multiple time zones at once, ideal for remote teams distributed across 3+ continents.
Frequently Asked Questions
How accurate is the world clock?
The world clock uses your device's system time and JavaScript's Date object, which is synchronized with network time servers. It's accurate to within milliseconds and updates every second.
Does it account for daylight saving time?
Yes, the tool automatically detects and adjusts for daylight saving time (DST) based on each city's time zone rules, using the IANA time zone database. The transition rules differ by region: North America switches on the second Sunday of March and the first Sunday of November, Europe on the last Sunday of March and October, and cities that do not observe DST (like Tokyo or Beijing) are never shifted.
Why are cities grouped by region?
Grouping by geographic region makes it easier to compare times within the same area and find overlapping working hours for teams in similar locations.
Why is the time different from my wall clock?
Check your device's system time and time zone settings. The tool relies on your device's clock. If your device time is incorrect, the world clock will also be incorrect.
Can I use this for scheduling meetings across time zones?
Absolutely! This tool is designed for exactly that purpose. Compare times across different regions to find overlapping working hours and avoid scheduling conflicts.
What cities are included in the world clock?
100+ major cities across all continents including New York, London, Tokyo, Beijing, Sydney, Dubai, Paris, Berlin, Moscow, Singapore, Seoul, Mumbai, Sao Paulo, Toronto, Los Angeles, and many more. Cities are organized by geographic region for easy browsing.
How do I find the best time for a call between three time zones?
Check each region's current time and look for overlap during standard working hours (9 AM-5 PM local time). For example, 9 AM New York = 2 PM London = 10 PM Tokyo; only New York and London overlap. A better time would be 1 PM New York (6 PM London, 3 AM Tokyo) or use the European morning with Asian afternoon.
How accurate is the DST transition detection?
The tool uses the browser's built-in Intl.DateTimeFormat and time zone database (IANA tzdata), which is updated regularly by browser vendors. DST transitions are accurate to the exact day and time of change for each time zone. The DST indicator shows 'Yes' when DST is active in that city.
Does the tool work offline?
After the initial page load, the world clock uses your device's system time to calculate all city times. As long as the page is loaded, it continues to work offline. However, the tool needs an internet connection for the initial page load from the server.
How can I use this for travel planning?
Check the current time and DST status at your destination before traveling. This helps with: planning arrival activities, adjusting to local time to reduce jet lag, scheduling check-in times with hotels, and coordinating with local contacts. The UTC offset column helps you understand the time difference before you arrive.
Why does my world clock show 5:30 instead of 5:00 for New Delhi?
Because India is officially UTC+5:30, a half-hour offset, not a whole hour. Several regions use 30- or 45-minute offsets: Nepal is UTC+5:45, parts of Australia UTC+9:30, Chatham Islands UTC+12:45, and Newfoundland UTC-3:30. The world clock applies the real IANA time zone database, so these fractional offsets are correct, not a bug. If a city shows a whole-hour time where you expect a fraction, double-check that the correct city (not a nearby one) is selected.
Why does my world clock with seconds freeze when I switch to another tab?
Browsers throttle timers in background tabs to save battery, so the seconds ticker pauses or slows while you are elsewhere and catches up when you return. This is browser behavior, not a clock bug; the time shown is always recomputed from your device clock on return, and the minute and hour values stay correct even if the seconds appear to jump. Pin or keep the tab visible if you need continuous live seconds.