Because the earth's movement! Its seasons change because the different rotations.
Seasons After was created in 2006.
The Seasons - Cage - was created in 1947.
For All Seasons was created in 2000.
Sons of Seasons was created in 2007.
Sixteen Seasons was created in 2006.
Seasons of a Life was created in 1994.
Seasons of the Witch was created in 2003.
Russian Seasons was created in 2006.
New Seasons was created in 2007.
Seasons of My Soul was created in 2009.
The American Seasons was created in 2001.
Flashlight Seasons was created in 2003.