World Timezone Map
An interactive view of Earth's 38 timezone offsets, the cities that keep them, and the anomalies that make timekeeping stranger than it looks.
Interactive Timezone Map
Hover over a timezone band to see its UTC offset and major cities. The shaded region tracks real-time night across the globe.
24-Hour Time Ruler
Current time in every standard UTC offset. Your local timezone is highlighted.
World Clocks
Live time in major cities across all inhabited timezone offsets, updated every second.
Timezone Anomalies & Special Zones
Timezones are a political construct, not a geographic one. These are the places where the gap between solar time and clock time is widest.
How Timezones Work
The Basic Idea
Earth rotates 360° in 24 hours — that's 15° per hour. In a pure geographic system, every 15° of longitude would be one timezone. Real timezones follow political boundaries instead, which is why China (spanning 62° of longitude) uses a single timezone while France (spanning 12°) uses one that's an hour ahead of its solar noon.
UTC and the Prime Meridian
Coordinated Universal Time (UTC) replaced Greenwich Mean Time as the world's reference point in 1972. It's maintained by a network of atomic clocks, not by the sun's position over Greenwich. All other timezones are defined as offsets from UTC, from UTC-12 (Baker Island) to UTC+14 (Line Islands, Kiribati).
The Railroad Problem
Before 1883, every city kept its own solar time. A noon sun in Boston was 12 minutes ahead of New York. Railroads made this unworkable — schedule collisions were literal. The US adopted four standard time zones on November 18, 1883, "the day of two noons." The international system followed at the 1884 Washington Meridian Conference.
The Date Line
The International Date Line zigzags through the Pacific near 180° longitude. Crossing it westward, you skip forward a day; eastward, you repeat one. Kiribati moved the line in 1995 to keep the entire nation on the same day, creating the world's first UTC+14 timezone — the earliest place on Earth to enter each new day.
Daylight Saving Time
About 70 countries shift clocks forward in spring and back in autumn — but not on the same dates, and not all of them anymore. In 2024, the EU is still debating abolishing DST, while Arizona (US) and Queensland (Australia) have opted out entirely. The result: twice a year, the timezone map reshuffles for weeks.
Solar Noon vs. Clock Noon
In a perfect system, the sun is highest at 12:00. In practice, political timezones shift clock noon by up to 3 hours from solar noon. Western China (Kashgar, UTC+8) experiences solar noon near 15:00. Spain (UTC+1, geographically UTC+0) has solar noon around 13:40. The mismatch affects sleep, health, and culture.