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Seasons in 2013

Here are the dates of seasons in 2013. Seasons are astronomical events in relation to the position of the Earth on its orbit around the Sun (for more about how seasons work, check our tutorial 'Seasons')

. spring or the vernal equinox occurs on March 20th at 11:02 UT
. summer or the summer solstice occurs on June 21st at 05:04 UT
. fall or the autumnal equinox occurs on September 22nd at 20:44 UT
. winter or the winter solstice occurs on December 21st at 17:11 UT

Each year Earth, further, is reaching its perihelion (its closest to the Sun) and aphelion (its farthest from the Sun). for more about how those concepts work, check too our tutorial 'Seasons'

. Earth's perihelion occurs on January 2nd at 00:59 UT
. Earth's aphelion occurs on July 5th at 18:59 UT