Time Zones Quiz

Match countries to their standard UTC offset.

Match countries to their UTC offsets — and meet the ones that use half-hour offsets, the country with a single zone spanning five, and the one that skipped a day.

How time zones actually work

In principle the world is divided into 24 zones of 15 degrees longitude each, offset from Coordinated Universal Time. In practice zones follow political borders rather than meridians, because countries prefer not to have a time change running through the middle of a city.

That gap between the theory and the practice is where all the interesting cases live.

The half-hour and quarter-hour offsets

Not every zone is a whole hour from UTC:

India uses a single offset of five and a half hours, covering the entire country.
Iran, Afghanistan, Myanmar and parts of Australia also use half-hour offsets.
Nepal uses an offset of five hours forty-five minutes — a quarter-hour offset, and one of very few in the world.
The Chatham Islands in New Zealand use another quarter-hour offset.

Nepal's is deliberate: it is set relative to a specific mountain rather than rounded to the nearest half hour.

The extremes

China spans roughly five geographic time zones and uses one for the entire country. That means sunrise in the far west can come several hours later by the clock than in the east — a political decision rather than a geographic one.

Russia is the opposite: it spans eleven time zones, more than any other country.

France has more time zones than any other country once its overseas departments and territories are counted, spread across the globe.

Kiribati and the date line

Kiribati straddles the International Date Line, which originally meant parts of the country were on different calendar days. In 1995 it moved the line east so the whole country shares a date — and in doing so, some of its islands skipped a day entirely.

It is also why Kiribati is among the first places on Earth to enter each new year.

Why this is worth knowing

Time zones encode politics, not just geography. A map of time zones shows you where borders matter more than meridians, which countries prioritise internal unity over solar accuracy, and where colonial history still shapes daily life.

Where to go next

Hemispheres covers the east-west divisions these offsets are built on, and the two together explain a lot about how the world is carved up on paper.

Frequently asked questions

How many time zones does China have?

One, officially, despite spanning roughly five geographic time zones. The entire country runs on a single offset, which means sunrise in the far west arrives several hours later by the clock than in the east.

Which country has the most time zones?

France, once its overseas departments and territories around the world are counted. Russia has the most in one contiguous landmass, spanning eleven.

Why does India use a half-hour time offset?

India uses a single national offset of five and a half hours from UTC, splitting the difference across a country that spans nearly two geographic zones. Nepal goes further with a quarter-hour offset set relative to a specific mountain.

Did a country ever skip a day?

Yes. In 1995 Kiribati moved the International Date Line east so the whole country would share a calendar date, and its eastern islands skipped a day entirely in the process. It also made Kiribati among the first places on Earth to see each new year.

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