Geography
Each time zone in the world differs from the next by 15 degrees in longitude and 1 hour in time.
Latitudes & Longitudes
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Answer
The Earth rotates 360° in 24 hours, which means it turns 15° of longitude every hour (360° ÷ 24 = 15°). Therefore, for every 15° of longitude travelled east or west, there is a 1-hour difference in local time.
If you move eastward, the time increases by 1 hour for every 15°.
If you move westward, the time decreases by 1 hour for every 15°.
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