The map developed by Google engineer Stefano Maggiolo shows the difference between ‘clock time’ and ‘solar time’— a schedule in which the sun is at its highest point in the sky at exactly 12 noon. The map was inspired by Maggiolo’s trip to Spain where he discovered that Madrid”s sunset is more than an hour later than that of Naples. This is because of the latitude and earth’s tilt as it moves around the sun causing solar days to vary throughout the year.

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