Winter - one of four seasons, between autumn and the spring.
The main sign of this season - steady low temperature (lower 0 degrees on Celsius), in many areas of the Earth drops out and lays down snow on earth surface.
The astronomical winter on a planet lasts from the moment of a winter solstice till a spring equinox, that is in the Northern hemisphere of Earth from December 22 to March 21, in the Southern hemisphere from June 22 to September 21. In different years (on Earth) these astronomical moments fall on different time (within the specified days), however the Gregorian calendar is developed so that it will not make a mistake very long time. Recently the winter begins much later. The calendar winter consists of three months: in the Northern hemisphere it is December, January and February, in West - June, July and August.
Please look at this beautiful season and enjoy with us this images.