Spring, also known as springtime, is one of the four temperate
seasons, succeeding winter and preceding summer. There are various
technical definitions of spring, but local usage of the term varies
according to local climate, cultures and customs. When it is spring in
the Northern Hemisphere, it is autumn in the Southern Hemisphere and
vice versa. At the spring (or vernal) equinox, days and nights are
approximately twelve hours long, with daytime length increasing and
nighttime length decreasing as the season progresses.

Spring and "springtime" refer to the season, and also to ideas of
rebirth, rejuvenation, renewal, resurrection and regrowth. Subtropical
and tropical areas have climates better described in terms of other
seasons, e.g. dry or wet, monsoonal or cyclonic. Cultures may have
local names for seasons which have little equivalence to the terms
originating in Europe.
Spring (season)