World Clock
Live current time in 16 major cities worldwide. Updates every second.
About the World Clock
The world clock displays the current local time in 16 of the most internationally referenced cities, updated every second using your browser's built-in timezone support. Each card shows the local time, current date, day of the week, and UTC offset. Cities in timezones ahead of UTC may already be on the next calendar day — that is shown with a "tomorrow" indicator so you never schedule across the wrong date.
The UTC offsets shown reflect the current offset, which changes when a region transitions into or out of Daylight Saving Time. A city showing UTC+1 in January may show UTC+2 in July if it observes summer time. The clock uses the IANA timezone database, the same standard used by every major operating system and browser, ensuring accuracy for all DST transitions.
World Time Zone Regions
Americas: Span 7 standard time zones (UTC-5 to UTC-10 for contiguous US), with New York anchoring the East Coast (EST/EDT) and Los Angeles anchoring the West Coast (PST/PDT). São Paulo at UTC-3 is notable for not observing DST, while most of Canada and the contiguous US do.
Europe: Most of continental Europe uses Central European Time (CET, UTC+1 in winter / CEST, UTC+2 in summer). The UK and Ireland use GMT in winter and BST/IST in summer (UTC+1). Eastern Europe (Romania, Bulgaria, Estonia) runs on EET (UTC+2 / UTC+3 in summer). Russia does not observe DST — Moscow is fixed at UTC+3.
Asia: The most diverse region — India uses a half-hour offset (IST, UTC+5:30), China uses a single time zone for the entire country (UTC+8) despite its vast east-west span, and Japan uses a fixed UTC+9 with no DST. The Middle East is mostly UTC+3 to UTC+4.
Pacific: Australia spans three main zones: Perth (AWST, UTC+8), Adelaide (ACST, UTC+9:30), and Sydney/Melbourne (AEST, UTC+10). New Zealand at UTC+12 is 17 hours ahead of New York in winter, making same-day video calls challenging — calls scheduled for "Tuesday evening" in New York may fall on "Wednesday morning" in Auckland.
Business Hours Overlap
One of the most practical uses of a world clock is determining when business hours overlap between two cities. New York (9 AM–5 PM ET) and London (9 AM–5 PM GMT/BST) overlap for about 4–5 hours each day, making morning calls (ET) coincide with afternoon calls (London). New York and Singapore (UTC+8) have almost no overlap — Singapore's 9 AM falls at 8 PM the previous day in New York. For teams working across such gaps, the Meeting Planner finds optimal times automatically.
Frequently Asked Questions
What time is it in Tokyo right now?
Tokyo uses Japan Standard Time (JST, UTC+9). Japan does not observe DST — the offset is fixed year-round. The world clock above shows the live current time updated every second.
What time is it in London right now?
London uses GMT (UTC+0) in winter and BST (UTC+1) in summer. The switch to BST happens on the last Sunday of March; the return to GMT is on the last Sunday of October. The clock above shows the current live time including any DST adjustment.
Why do some cities show a different date?
Because the world spans 24 time zones, the calendar date differs between distant cities. When it is 11 PM Monday in New York, it is already Tuesday afternoon in Tokyo. Both the time and date are shown in each city card to avoid scheduling errors.
What is the International Date Line?
An imaginary line near the 180° meridian in the Pacific. Crossing it eastward moves the calendar back one day; crossing westward moves it forward. This is why New Zealand and Hawaii can show different calendar dates even though they are only a few hours apart in local time.
Which city is furthest ahead of UTC?
Among populated cities, Apia (Samoa) at UTC+13 and Auckland (New Zealand) at UTC+12/+13 are furthest ahead. Honolulu (Hawaii) at UTC-10 is furthest behind among the cities on this clock.