Night
period from sunset to sunrise in each twenty-four hours
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Night or nighttime is the time when the Sun is not in the sky. Night happens between dusk & dawn. The opposite of night is daytime. The start and end times of night are different in different geographic locations. It varies on season, latitude, longitude and timezone.
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In other time zones, the night occurs at different times. This is because the Sun shines on different parts of the Earth at different times. During a solar eclipse it is also partially night because the Sun is blocked out by the Moon.
In popular culture, night is often thought of as a symbol of evil, because of the fear of the dusk, lack of being able to see what's around and criminals like doing crimes at nightfall.