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Epoch Calculator
UTC 02:14:22

World Clock

Live time in any city. Changes save automatically to this browser.

  • UTC
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  • America/New York
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  • Europe/London
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  • Asia/Tokyo
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How the world clock works

This world clock displays the current local time in any city or IANA time zone, updated every second. Each card shows the time, date, time zone abbreviation, and UTC offset. Your saved zones are stored in your browser — no account required.

Understanding UTC offsets

Every time zone is defined as an offset from UTC (Coordinated Universal Time), the global time standard. New York is UTC−5 in winter (Eastern Standard Time) and UTC−4 in summer (Eastern Daylight Time). London is UTC+0 in winter (GMT) and UTC+1 in summer (BST). Tokyo stays at UTC+9 year-round — Japan does not observe DST.

Daylight saving time

DST shifts clocks forward 1 hour in spring and back in autumn across most of North America and Europe. The US transitions on the second Sunday of March and the first Sunday of November. EU member states transition on the last Sunday of March and the last Sunday of October, meaning there is a 1–3 week window each spring and autumn where the US and EU are offset by a different amount than usual. Countries such as India, China, Japan, and most of Africa do not observe DST.

Frequently asked questions

What is a world clock?
A world clock shows the current time in multiple locations simultaneously, letting you compare different time zones at a glance. Each clock updates every second and shows the UTC offset and abbreviation for that zone.
How many cities can I track?
There is no limit. Add as many IANA time zones as you need — your selection saves automatically to this browser with no account required.
What is UTC?
UTC (Coordinated Universal Time) is the primary global time standard. All other time zones are defined as offsets from UTC. New York is UTC−5 in winter (EST) and UTC−4 in summer (EDT).
What is the IANA time zone database?
The IANA tz database is the definitive registry of time zones worldwide. It encodes all historical and current UTC offsets and DST rules for every region on Earth, and is used by this tool via Luxon.

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