Seasons for the Northern Hemisphere, 2007
- Vernal Equinox: Mar. 20, 8:07 P.M. EDT (Mar. 21, 00:07 UT*), Sun enters sign of Aries; spring begins.
- Summer Solstice: June 21, 2:06 P.M. EDT (18:06 UT*), Sun enters sign of Cancer; summer begins.
- Autumnal Equinox: Sept. 23, 5:51 A.M. EDT (09:51 UT*), Sun enters sign of Libra; fall begins.
- Winter Solstice: Dec. 22, 1:08 A.M. EST (06:08 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.