Saturday 9 August 2014
Winter is the coldest season of the year in temperate
climates, between autumn and spring. It is caused by the axis of the Earth in
the respective hemisphere being oriented away from the Sun. Different cultures
define different dates as the start of winter, and some use a definition based
on weather, but when it is winter in the Northern Hemisphere it is summer in
the Southern Hemisphere, and vice versa. Source
