The longest day of the year, known as the summer solstice occurs June 21 2013, at exactly 1:04 am EDT (10:04pm PDT), when the Northern Hemisphere of the Earth will reach the point of greatest inclination to the Sun.
Seasons of 2013:
SPRING EQUINOX March 20, 7:02 A.M. EDT
SUMMER SOLSTICE June 21, 1:04 A.M. EDT, 10:04pm PDT
FALL EQUINOX September 22, 4:44 P.M. EDT
WINTER SOLSTICE December 21, 12:11 P.M. EST
Read more from The Old Farmer’s Almanac.
ENJOY YOUR SUMMER!