These three tests use very different approaches to test for normality: (1) JB uses the moments-based comparison, (2) SW examines the correlation in the Q-Q plot and (3) AD tests the difference between empirical and theoretical distributions.
Summer solstice: Longest day of the year. June 21 at 6:51 a.m. EDT is the summer solstice, the moment the sun is directly shining down on the Tropic of Cancer, an imaginary line north of the equator. This is the longest day of the year for the Northern Hemisphere and marks the beginning of summer.
It is the winter solstice in the Northern Hemisphere, where it is the shortest day of the year. In the Southern Hemisphere, it is the summer solstice and the longest day of the year. December Solstice in New York, New York, USA is on. Thursday, December 21, 2017 at 11:28 am EST (Change city) December Solstice in Universal Coordinated Time is on.