Season is one of the major divisions of the year, generally based on yearly periodic changes in weather.

Seasons happen due to 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 amount of sunlight which
may cause animals to go into hibernation or to migrate, and plants to be dormant.

The Northern hemisphere is closer to the sun at times of the year than the southern,
it is exposed to more light causing summer to come into action at different times as the earth revolves.

In temperate and polar regions generallyfour seasons are recognized: spring, summer, autumn, winter.