🌍World clock

✓ Tested & verified Updated: Aug 11, 2026 How this works

World clock

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Your zone: —

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0 cities. Zones are worked out from your browser's own time-zone database, so daylight saving is already in them.

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How is the time in another country worked out?

The TimerPlan world clock asks your browser’s own time-zone database for the time in each named zone, which is why daylight saving is already included and why the offsets are right today rather than on the day the page was written. Storing an offset per country is the common shortcut and it is wrong for several weeks a year.

Zones are named the IANA way — Europe/Paris, America/Denver, Asia/Kolkata — because a country is not a zone. France has twelve counting its territories, the United States has six, and Australia has three including a half-hour offset.

Each row shows the local time and date, the offset from UTC, the difference from your own zone, and a day-or-night mark, which is usually the thing you actually wanted to know: whether it is a reasonable hour to call.

Offsets that catch people out, and why:

Zone	Offset	Note
India	UTC+5:30	One zone for the whole country, on the half hour
Nepal	UTC+5:45	The only quarter-hour zone in common use
China	UTC+8	One zone across five geographic ones
Arizona	UTC−7 all year	Does not observe daylight saving
Australia	UTC+8 to +11	Three zones, one of them on the half hour
Newfoundland	UTC−3:30	Half-hour offset in North America

Add the cities you deal with and the list stays as long as you need it. Nothing is stored, so the set is per visit — which is the trade for a page that needs no account.

To convert a specific time rather than watch the clock, the time zone converter answers “this time here, what time there” including whether it lands on another day. To find the hours where several zones overlap, the world meeting planner in time plans does the arithmetic across a whole list. For one big clock on a spare screen, use the full screen clock.

Frequently asked questions

Why do the London and New York clocks differ by four hours sometimes and five at others?

Because the two countries change their clocks on different dates. The US moves in the second week of March and the UK on the last Sunday in March, so for roughly three weeks in spring the usual five-hour gap is four; the same happens in reverse for a week in autumn. Anything that stores the gap as a constant is wrong twice a year, which is why the offsets here are computed rather than looked up.

Are time zone abbreviations reliable?

No, and they are worth avoiding in writing. CST is Central Standard Time in North America, China Standard Time and Cuba Standard Time; IST is India, Ireland and Israel. There is no authority over them and no guarantee of uniqueness. The IANA names used here — a region and a representative city — are unambiguous, and are what software uses internally.

What about zones with a half or quarter hour offset?

They are handled like any other: India is UTC+5:30, Nepal is UTC+5:45, parts of Australia are UTC+9:30, and Chatham Island is UTC+12:45. They exist because a zone is a political decision rather than a slice of the planet, and any tool that assumes whole hours gets them wrong. The offsets shown here include minutes where there are minutes.

Does the day-or-night mark account for the seasons?

No — it is a simple rule, day between seven in the morning and seven in the evening. Real sunrise and sunset depend on latitude and date, and in June the difference between Oslo and Nairobi is enormous. As a signal for whether it is a decent hour to phone someone, working hours are a better guide than daylight anyway, which is what the mark is for.

How this works

Each row is produced by formatting one instant — now — in a named IANA time zone using the browser’s internationalisation engine, which carries the same zone database the operating system updates. The offset shown alongside is derived by formatting that instant in the zone and comparing it against UTC rather than being stored anywhere, so daylight saving, half-hour zones and historical changes are all included by construction. The difference from your own zone is the difference of those two computed offsets; your zone is read from the browser rather than asked for. Rows refresh once a second, which is enough for a clock and cheap enough to leave open all day. The day-or-night mark is a fixed seven-to-seven rule and is described as such rather than dressed up as a sunrise calculation.

Sources:

Reading a row

The date matters as much as the time. A colleague in Sydney is often on tomorrow, and the row says so.

The offset is today’s. Not a stored constant, so it is correct through every clock change.

Day or night, not sunrise. A rough mark for whether calling is reasonable.