How wrong is your time zone?

In an ideal world, everyone’s clocks would strike 12 noon just as the Sun reached the highest point in its path across the sky. But clock- (aka “standard-“) time and solar time rarely overlap, with one generally leading or lagging behind the other – a fact this map by math blogger and Google engineer Stefano Maggiolo clearly illustrates.

Why do these discrepancies exist? Maggiolo offers two important reasons…

via How wrong is your time zone?.

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