Winter

Winter

 Winter is the coldest period of the year in polar and mild zones (winter doesn't happen in the greater part of the equatorial area).

 It happens after pre-winter and prior to spring in every year. Winter is brought about by the pivot of the Earth in that side of the equator being focused away from the Sun. Various societies characterize various dates as the beginning of winter, and some utilization a definition dependent on climate.

 At the point when it is winter in the Northern Hemisphere, it is summer in the Southern Hemisphere, and the other way around. In numerous areas, winter is related with day off frosty temperatures. The snapshot of winter solstice is the point at which the Sun's rise as for the North or South Pole is at its most negative worth (that is, the Sun is at its farthest beneath the skyline as estimated from the pole). 

The day on which this happens has the briefest day and the longest night, with day length expanding and night length diminishing as the season advances after the solstice. The most punctual nightfall and most recent dawn dates outside the polar locales vary from the date of the colder time of year solstice, notwithstanding, and these rely upon scope, because of the variety in the sun oriented day over time brought about by the Earth's circular circle (see soonest and most recent dawn and dusk).