Here the calendar changing seasons dates (spring, summer, autumn and winter) for the year 2015. A season lasts about 3 months and is characterized by a relative constancy in the weather there (climate and temperature) . The seasons change, which is linked to celestial mechanics, is bounded by the March and September equinoxes and solstices in June and December.
Spring
Friday, March 20, 2015--------on Saturday, June 20, 2015
Summer
of Sunday, June 21, 2015-------on Monday, September 21, 2015
Autumn
of Tuesday, September 22, 2015----on Monday, December 21, 2015
Winter
Tuesday, December 22, 2015-----on Saturday, March 19, 2016
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