Summer Solstice

The summer solstice occurs at the moment the earth's tilt toward the sun is at a maximum and directly over the Tropic of Cancer, which is located at 23*5"latitude North.
The Tropic of Cancer runs through Mexico, the Bahamas, Egypt, Saudi Arabia, India and southern China.
For everyplace north of the Tropic of Cancer, the sun is at its highest point in the sky and this is the longest day of the year.
                                           Today, at 5:04 am EST, summer is officially here !

More info at http://www.shorenewstoday.com/snt/news/index.php/weather/40396-is-june-21-really-the-longest-day.html