World Time Tracker
Collaboration across time zones has never been easier - Intuitively viewing time in different cities around the world
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Daylight
Main city time
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New York
United States | EDT
UTC-4
15:12
星期三, 四月 15, 2026
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London
United Kingdom | BST
UTC+1
20:12
星期三, 四月 15, 2026
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Paris
France | CEST
UTC+2
21:12
星期三, 四月 15, 2026
🇯🇵
Japan
Japan | JST
UTC+9
04:12
星期四, 四月 16, 2026
Global Time Zone Overview
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Hawaii
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Ottawa
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New York
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London
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Paris
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Dubai
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Beijing
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Sydney
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Time zone knowledge
What is a time zone?
The time zone is the time offset on the earth relative to UTC (Coordinated Universal Time). The earth is divided into 24 time zones, each covering about 15 degrees of longitude. This division allows the world to determine local time based on the location of the sun.
UTC coordinates world time
UTC is international standard time, also known as Greenwich Standard Time (GMT). All other time zones are defined relative to UTC, using positive and negative hours to represent the offset.
Daylight saving time
Daylight saving time (DST) is the practice of adjusting the clock forward for an hour in the summer months, with the goal of making better use of daylight. Not all countries and regions implement daylight saving time.
Time zone history
The modern time zone system began with railway development in the late 19th century. In 1884, the International Meridian Conference established a global time zone system based on Greenwich.
More time zone knowledge
Learn how time zones work, daylight saving time and history of global timing.
Browse time zone information
