Set your clocks, Tushkateers*! The longest day of the year a.k.a. the Summer Solstice, is scheduled to arrive on Saturday, June 21 at 6:51 a.m. EDT, at which time the Earth’s northern hemisphere faces, most directly, toward the sun. In that moment, or minute (6:51 a.m. EDT), the sun, when viewed from planet Earth, appears…