Season

A season is a subdivision of the year, marked by changes in weather, ecology, and hours of daylight. Seasons result from the yearly revolution of the Earth around the Sun and the tilt of the Earth's axis relative to the plane of revolution. In temperate and polar regions, the seasons are marked by changes in the intensity of sunlight that reaches the Earth's surface, variations of which may cause animals to go into hibernation or to migrate, and plants to be dormant.

During May, June and July, the northern hemisphere is exposed to more direct sunlight because the hemisphere faces the sun. The same is true of the southern hemisphere in November, December and January. It is the tilt of the Earth that causes the Sun to be higher in the sky during the summer months which increases the solar flux. However, due to seasonal lag, June, July and August are the hottest months in the northern hemisphere and December, January and February are the hottest months in the southern hemisphere.

In temperate and subpolar regions, generally four calendar-based seasons (with their adjectives) are recognized: spring (vernal), summer (estival), autumn (autumnal) and winter (hibernal). However, ecologists mostly use a six season model for temperate climate regions that includes pre-spring (prevernal) and late summer (serotinal) as distinct seasons along with the traditional four.

Hot regions have two or three seasons; the rainy (or wet, or monsoon) season and the dry season, and in some tropical areas, a cool or mild season.

In some parts of the world, special "seasons" are loosely defined based on important events such as a hurricane season, tornado season or a wildfire season.

Famous quotes containing the word season:

    At this season I seldom had a visitor. When the snow lay deepest no wanderer ventured near my house for a week or fortnight at a time, but there I lived as snug as a meadow mouse.
    Henry David Thoreau (1817–1862)

    The theater is a baffling business, and a shockingly wasteful one when you consider that people who have proven their worth, who have appeared in or been responsible for successful plays, who have given outstanding performances, can still, in the full tide of their energy, be forced, through lack of opportunity, to sit idle season after season, their enthusiasm, their morale, their very talent dwindling to slow gray death. Of finances we will not even speak; it is too sad a tale.
    Ilka Chase (1905–1978)

    If woman is inconstant,
    good, I am faithful to
    ebb and flow, I fall
    in season and now
    is a time of ripening.
    Denise Levertov (b. 1923)