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:

    To me a book is a message from the gods to mankind; or, if not, should never be published at all.... A message from the gods should be delivered at once. It is damnably blasphemous to talk about the autumn season and so on. How dare the author or publisher demand a price for doing his duty, the highest and most honourable to which a man can be called?
    Aleister Crowley (1875–1947)

    The morning, which is the most memorable season of the day, is the awakening hour. Then there is least somnolence in us; and for an hour, at least, some part of us awakes which slumbers all the rest of the day and night.
    Henry David Thoreau (1817–1862)

    When we reached the lake, about half past eight in the evening, it was still steadily raining, and harder than before; and, in that fresh, cool atmosphere, the hylodes were peeping and the toads ringing about the lake universally, as in the spring with us. It was as if the season had revolved backward two or three months, or I had arrived at the abode of perpetual spring.
    Henry David Thoreau (1817–1862)