tropical zone. n the part of the Earth's surface between the Tropic of Cancer and the Tropic of Capricorn; characterized by a hot climate. any of the geographical zones loosely divided according to prevailing climate and latitude.
Evening is usually defined as the time between afternoon and you go to bed while night is defined as the period between sunset and sunrise. The time that evening begins is arguable but according to the Oxford English Dictionary it is at 6:00 p.m. Another definition claims that evening ends and night begins after sunset. An exact answer would be the following: Evening begins at 6:00 p.m. and ends at dusk when no sunlight is visible. The time from sunset, when the sun sinks below the horizon, until dusk is called twilight. Night begins at dusk and lasts until dawn, when sunlight is first seen.
The autumnal equinox occurs on September 22 or 23, and the season continues until the winter solstice on December 21 or 22. The winter solstice has the longest night and the shortest amount of daylight of the year. Autumn is also known as fall because it is the season in which leaves fall from deciduous trees.