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cultural twilight hour
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The Twilight Shift: When Does Evening Actually Begin?
For astronomers, the evening’s onset is precise: the instant the sun dips 12 degrees below the horizon, signaling nautical twilight. But for most people, the...
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For astronomers, the evening’s onset is precise: the instant the sun dips 12 degrees below the horizon, signaling nautical twilight. But for most people, the...