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What is a World Clock?

Earth is divided into approximately 24 standard time zones, and each country and city uses a unique time zone based on UTC (Coordinated Universal Time). When traveling, trading internationally, or collaborating across borders, knowing the local time of the other party is essential.

This tool calculates everything directly in your browser — no server required — and displays accurate real-time clocks. Daylight Saving Time (DST) is automatically accounted for.

How to Use

  1. Your local city time is automatically shown when you open the page.
  2. Click '+ Add City' to search for and add any city.
  3. Switch between Digital, Analog, and Timeline display using the toggle buttons.
  4. Use the Fullscreen button to focus on just the clocks.

Use Cases

Travel Planning

Check the current time and time difference in your destination city to coordinate flights and hotel check-ins.

Global Stock & Crypto Trading

Track market open times for New York, London, Shanghai, and other major exchanges in real time.

International Collaboration

Easily check everyone's local time when scheduling video calls or deadlines with overseas colleagues.

Staying in Touch

Before calling family or friends abroad, check whether it's daytime or nighttime for them.

FAQ

What time is it in New York right now?
Click '+ Add City', search for New York, and add it to see its real-time current time on a clock card.
What is the time difference between South Korea and the US West Coast?
During Daylight Saving Time it's 16 hours; outside DST it's 17 hours. This tool automatically adjusts for DST.
What is Daylight Saving Time (DST)?
DST is the practice of setting clocks forward by one hour during summer months. Many countries including the US and European nations observe it. This tool automatically calculates it using IANA timezone data.
How do I add a city?
Click '+ Add City', then search for a city name or timezone in the dropdown. Select it and a new clock card appears instantly.
Can I switch between analog and digital clocks?
Yes — use the Digital / Analog toggle buttons at the top to switch all clock cards at once.
Are my added cities saved?
Yes, they are saved to your browser's localStorage and restored on your next visit. Nothing is sent to any server.
What is the Timeline view?
The Timeline view displays each city's daytime (6–20h) and nighttime on a 24-hour horizontal axis with color coding. It lets you compare multiple time zones at a glance — ideal for scheduling international meetings and spotting time overlaps.

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