Seasons for the Northern Hemisphere, 2013
- Vernal Equinox: Mar. 20, 7:02 A.M. EDT (11:02 UT*), Sun enters sign of Aries; spring begins.
- Summer Solstice: June 21, 1:04 A.M. EDT (05:04 UT*), Sun enters sign of Cancer; summer begins.
- Autumnal Equinox: Sept. 22, 4:44 P.M. EDT (20:44 UT*), Sun enters sign of Libra; fall begins.
- Winter Solstice: Dec. 21, 1:11 P.M. EDT (17:11 UT*), Sun enters sign of Capricorn; winter begins.
*Universal time (UT), also known as Greenwich mean time (GMT). See Astronomy for a conversion table of universal time.