World Clock
Local time, time differences, and converters for cities worldwide.
Your local time · UTC
Thursday, 17 September 2026
What NowZones is for
NowZones is a small, independently published world clock. You can read the current civil time in a city, compare two places, or convert a meeting from one zone to another. Times come from the IANA Time Zone Database — the same rules most operating systems use — not from a decorative widget.
Each city page states the IANA identifier, the UTC offset in force today, whether daylight saving applies, and how sunrise sits against the clock. Difference pages show the live gap, a working-hour overlap, and an hour-by-hour grid. The converter is for one-off “when it is 09:00 there” questions that should not become another URL.
How to pick a page
Open a city when you need “what time is it in Tokyo.” Open a curated difference when two specific cities matter (London and New York, Copenhagen and Tokyo). Use the converter when the pair is not worth a dedicated page. The Learn guides explain UTC, daylight saving, and why abbreviations like CST are unsafe.
Time zone guides
Original explainers, not city-name templates. Start here if you need the rules rather than a clock.
What are time zones?
What time zones are, how UTC offsets are calculated from longitude, why daylight saving changes clocks, and how civil time evolved from solar noon to the IANA database.
UTC vs GMT: what is the difference?
GMT is mean solar time at Greenwich; UTC is an atomic time scale kept close to it. What separates them, when the difference matters, and which one to use.
Daylight saving time explained
Why clocks move twice a year, who changes when, how the US and EU transition dates differ, and what breaks when the offset shifts.
How to schedule meetings across time zones
Practical rules for cross-zone scheduling: anchor in a named zone, find real working-hour overlap, and survive daylight saving transitions.
US vs EU daylight saving dates
The United States and the European Union change clocks on different Sundays. How the calendars differ, what happens in the mismatch weeks, and how to keep a standing meeting honest.
How to write a timezone-safe calendar invite
Put a named IANA zone on the event, write both city times in the body, and never rely on CST or EST. A practical checklist for cross-zone meetings.
Popular time differences
These pairs are the ones people actually book meetings around. Each page has a unique note on why the gap behaves the way it does.
London vs New York
This is the default transatlantic meeting pair: finance, media, and product teams book it constantly. The gap is usually five hours in northern summer and five hours in winter too under current rules — both cities spring forward — but the overlap window is still only the London afternoon / New York morning, and it slips by an hour for a week when the two DST change dates do not match.
London vs Los Angeles
London and Los Angeles are eight or nine hours apart depending on the season, which is why “a quick call” rarely sits in both working days. The usable overlap is late afternoon in London against early morning on the West Coast; entertainment and tech stand-ups often park at 17:00 GMT/BST.
New York vs Tokyo
New York and Tokyo barely share a weekday. Tokyo is typically 13 or 14 hours ahead, so a 09:00 New York meeting is already evening in Tokyo. Teams that must talk live usually pick Tokyo early morning against New York late evening, or they stop pretending the workdays overlap and use async hand-offs.
London vs Tokyo
London mornings are Tokyo evenings. The pair is a staple for UK–Japan finance and manufacturing; the comfortable slot is 08:00–09:00 in London (16:00–18:00 in Tokyo, depending on British Summer Time). There is no generous midday overlap.
London vs Paris
London and Paris sit one hour apart most of the year (CET/CEST versus GMT/BST). That small gap still wrecks “same clock” assumptions in calendar software if someone types CET as a fixed offset. Both sides change clocks on the EU/UK Sundays, so the one-hour difference is stable except on the rare mismatched transition weekend.
New York vs Paris
Paris is six hours ahead of New York in winter and six in summer when both are on daylight saving — the useful overlap is Paris late afternoon against New York morning. EU and US change clocks on different Sundays, so check the gap near late March and late October.
Popular cities
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