Time Zone Explorer

Search or click a country to see its current local time, GMT offset, time-zone name, date, and daylight-saving status where available.

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Map boundaries: Natural Earth via world-atlas. Country reference data: mledoze/countries. Time-zone identifiers: countries-and-timezones. Current local times and GMT/UTC offsets are calculated by the browser using IANA time-zone rules, so daylight-saving changes are reflected when supported.

How to use the Time Zone Explorer

Click a country on the map or type its name in the search box. You will see the current local time, the date, the GMT/UTC offset, the official time-zone name (such as Asia/Seoul or America/New_York), and whether daylight saving time is in effect, where that information is available. Countries with several time zones list each one.

It’s useful for scheduling a call with family abroad, planning a meeting across countries, or checking whether it’s a reasonable hour to send a message.

Understanding time zones

The world’s clocks are based on Coordinated Universal Time (UTC), which is essentially the same as Greenwich Mean Time (GMT). Every time zone is written as an offset from UTC:

  • UTC+9 (Korea and Japan) is nine hours ahead of UTC.
  • UTC−5 (New York in winter) is five hours behind UTC.

So when it’s 9:00 PM in Seoul, it’s 12:00 noon in London (during winter) and 7:00 AM in New York.

Time-zone names like America/Chicago come from a shared international database that computers and phones use to keep time correctly, including all the historical changes to each region’s rules.

Daylight saving time

Many countries in North America and Europe move their clocks forward one hour in spring and back in autumn. Most of Asia, Africa, and South America don’t. That means the time difference between two cities can change during the year. For example, Seoul is 13 hours ahead of New York in summer, but 14 hours ahead in winter. Because the explorer calculates times for today’s date, it automatically shows the correct current offset.

Surprising facts to explore

  • China uses a single time zone (UTC+8) across a country that is about 5,000 kilometers wide. In the far west, the sun can rise at around 10 AM.
  • France has the most time zones of any country, about 12, because of its overseas territories around the world, such as French Polynesia and Réunion. The map shows mainland France, which uses Central European Time.
  • India uses UTC+5:30, and Nepal uses UTC+5:45. Not every time zone is a whole number of hours.
  • Russia spans 11 time zones, from Kaliningrad to Kamchatka.

Tips for scheduling across time zones

  • Always state the time zone in invitations, such as “3 PM KST” or “9 AM ET.”
  • Double-check around March, April, October, and November, when different countries switch their clocks on different dates.
  • Remember the date line. A call on Monday evening in Los Angeles is Tuesday afternoon in Seoul.

Where the data comes from

Time-zone names and offsets come from the widely used IANA time zone database through an open-source dataset, and current times are calculated by your own browser. Country boundaries come from the public Natural Earth data.

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