World Clock

View real-time clocks for major global cities with our World Clock app. Get instant access to local times, dates, and time zones for over 100 locations worldwide. No login required.
Local Time
New York City, USA
London, UK
Paris, France
Dubai, UAE
Sydney, Australia
Tokyo, Japan
Rio de Janeiro, Brazil
Cape Town, South Africa
Seoul, South Korea
City Date Time Time Zone

About

Real-time Clock Display

Shows continuously updated digital clocks for multiple major cities

Local Time Display

Displays the current local time of the user

City Selection

Includes a diverse selection of major global cities

Date and Time Zone Information

Provides detailed date, time, and time zone data for each city

Sortable City List

Offers an alphabetically sorted list of over 100 cities with their current times

Reference

Time zones are regions on Earth that observe the same standard time. They were established to provide a standard reference for scheduling events and activities across different locations. The world is divided into 24 main time zones, each spanning 15 degrees of longitude, with some areas observing daylight saving time during certain periods. Time zones help coordinate schedules and ensure consistent time references globally.

Calculation

The world clock calculates the current time for each city based on its corresponding time zone offset from Coordinated Universal Time (UTC). It applies the appropriate offset to the current UTC time to determine the local time for that specific time zone. The calculations account for daylight saving time rules, ensuring accurate time display even during periods when certain regions observe seasonal time changes.

Frequently Asked Questions

Why do we need time zones?
Time zones provide a consistent reference for time across different regions, allowing for easier coordination of activities and schedules on a global scale.
How does the world clock determine the correct time for each city?
The world clock uses the time zone offset and daylight saving time rules for each city to calculate the accurate local time based on the current Coordinated Universal Time (UTC).
Can I customize the cities displayed in the world clock?
This implementation does not allow for customizing the list of cities shown. It displays a predefined set of major cities from various time zones around the world.
How often is the time updated on the world clock?
The time displayed on the world clock is updated continuously in real-time, ensuring accurate and up-to-date information.
Is the world clock available for offline use?
No, this world clock implementation requires an internet connection to function correctly, as it relies on retrieving the current UTC time and applying the appropriate calculations.