I was led to believe....
shortest day was Dec 21st
longest day June 21st
Seems it can change yearly
2007
VERNAL EQUINOX (SPRING) MARCH 21 2007 00:07 GMT
SUMMER SOLSTICE (SUMMER) JUNE 21 2007 18:06 GMT
AUTUMNAL EQUINOX (FALL) SEPTEMBER 23 2007 09:51 GMT
WINTER SOLSTICE (WINTER) DECEMBER 22 2007 06:08 GMT
2008
VERNAL EQUINOX (SPRING) MARCH 20 2008 05:48 GMT
SUMMER SOLSTICE (SUMMER) JUNE 20 2008 23:59 GMT
AUTUMNAL EQUINOX (FALL) SEPTEMBER 22 2008 15:44 GMT
WINTER SOLSTICE (WINTER) DECEMBER 21 2008 12:04 GMT