what month is spring winter
By the meteorological calendar, spring starts on 1 March. The seasons are defined as Spring (March, April, May), Summer (June, July, August), Autumn (September, October, November) and Winter (December, January, February). The next astronomical spring begins on 20 March 2016 and runs until 21 June 2016. The astronomical calendar determines the seasons due to the 23.5 degree tilt of the Earth's rotational axis in relation to its orbit around the sun. Both equinoxes and solstices are related to the Earth's orbit around the sun.