World Time Zone Map — Interactive IANA Browser

Interactive World Map

Click any colored band to select that time zone. Selection persists in your saved list below.

IANA Zone Browser

More zone tools: Time zone converter · Overlap finder

UTC Offset → Brain-Friendly Lookup

Time Zone Math

Saved Time Zones

How To Use The Timezone Map

1. 1. Click any vertical band on the map to select that zone — selected band gets a white outline.
2. 2. Read the hero card for IANA name, abbreviation, DST status, and live local time.
3. 3. Filter the table by continent to drill into a region.
4. 4. Use the quick conversion strip for any UTC time → local arithmetic.
5. 5. Saved zones persist locally — your shortlist survives page refresh.

A Brief History Of Time Zones

In 2026, a remote-team ops lead in Oslo is scheduling a Tuesday standup with engineers in Mumbai, São Paulo, and Sydney. The eight-hour spread between Mumbai (UTC+5:30) and Sydney (UTC+10) means there is exactly a 2-hour mutual-business window. Finding that window without a clean time-zone map is the kind of cognitive friction that drains modern distributed teams.

Time zones as a concept barely existed before 1880. Each town set its clock by the local sun — solar noon was 12:00 in every city. A railway schedule across the US could contain six different "12:30 PM" arrivals at different stations. Sandford Fleming, Scottish-Canadian engineer for the Canadian Pacific Railway, proposed in 1879 the system of 24 hour-wide zones offset from a Prime Meridian — adopted at the International Meridian Conference in Washington in October 1884, which placed the Prime Meridian at Greenwich, England.

The US implementation came November 18, 1883 — "The Day of Two Noons" — when American railroads switched from local solar time to four standard zones (Eastern, Central, Mountain, Pacific). The US Congress only made it federal law in the Standard Time Act of 1918. Daylight Saving came alongside, first proposed by George Hudson (NZ, 1895), implemented in Germany (1916) as a wartime fuel-saving measure, adopted in the US in 1918 and made permanent (with seasonal shifts) in the Uniform Time Act of 1966.

The IANA Time Zone Database — the canonical source every modern operating system uses — was started in 1986 by Arthur David Olsonat the National Institutes of Health. Olson's tzdb was donated to the public domain. After Olson's retirement in 2011 the project moved to ICANN (Internet Assigned Numbers Authority) under maintainer Paul Eggert at UCLA, with releases now several times per year as countries change DST rules.

Notable historical changes: Russia eliminated DST in 2014. Brazil ended its 80-year DST tradition in 2019. The European Parliament voted in March 2019 to abolish DST across the EU starting 2021, but implementation has been delayed indefinitely. North Korea adopted UTC+8:30 in 2015 for "freedom from Japanese imperialism", reverted to UTC+9 in 2018. Samoa and Tokelau crossed the International Date Line in 2011, jumping from UTC−11 to UTC+13.

Modern complications: distributed databases must store all timestamps in UTC and apply the IANA offset at display time. Storing local timestamps fails the moment DST changes or the timezone-database is updated. Python's pytz, JavaScript's Intl.DateTimeFormat, Java's java.time, .NET's TimeZoneInfo all wrap the IANA tzdb. The annual leap second is a different challenge — managed by IERS (International Earth Rotation Service).

Continue with time zone converter, meeting planner, and overlap finder.

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