World Basics · Reading the map
Latitude, longitude & time zones
Read any coordinate, and understand why New York, London and Tokyo trading hours overlap the way they do.
Step 1 of 4 · Overview15 min read ·
| Line | What | Key values |
|---|---|---|
| Latitude | north–south, 0° at Equator | Tropics ±23.4°, poles ±90° |
| Longitude | east–west, 0° at Greenwich | ±180° at the antimeridian |
Earth turns 360° in 24h, so 15° of longitude ≈ 1 hour. That's why there are roughly 24 time zones, bent around borders by politics.
Tokyo
UTC+9
London
UTC+0 / +1 summer
New York
UTC−5 / −4 summer
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