June 21 - Summer Solstice

SummerSolstice - Earth is at a point in its orbit where one hemisphere is most tilted towards the Sun, causing the Sun to appear at 23.45 degrees above the celestial equator, thus making its highest path across the sky. The summer solstice is the day of the year with the longest daylight period and hence the shortest night.

SunAtZenith - Today the Sun appears to be directly overhead at midday along an imaginary line on the Northern Hemisphere known as the Tropic of Cancer.