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Night is the period between the end of (1)_____ and the beginning of (2)_____ or such other period between sunset and sunrise.

  • A

    (1) evening civil twilight; (2) morning civil twilight.

  • B

    (1) evening civil sunset; (2) morning civil sunrise.

  • C

    (1) evening civil twilight; (2) morning civil sunrise.

  • D

    (1) morning civil twilight; (2) evening civil twilight.

ICAO Annex 1

Night. The hours between the end of evening civil twilight and the beginning of morning civil twilight or such other period between sunset and sunrise, as may be prescribed by the appropriate authority.

Note.— Civil twilight ends in the evening when the centre of the sun’s disc is 6 degrees below the horizon and begins in the morning when the centre of the sun’s disc is 6 degrees below the horizon.

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