Seasons for the Northern Hemisphere, 2010
- Vernal Equinox: Mar. 20, 1:32 P.M. EDT (17:32 UT*), Sun enters sign of Aries; spring begins.
- Summer Solstice: June 21, 7:28 AM EDT (11:28 UT*), Sun enters sign of Cancer; summer begins.
- Autumnal Equinox: Sept. 22, 11:09 P.M. EDT (03:09 UT*), Sun enters sign of Libra; fall begins.
- Winter Solstice: Dec. 21, 6:38 PM EST (23:38 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.