The summer solstice 2017 will occur on Wednesday, June 21 at 4:24 UT (12:24 AM EDT).
A solstice happens when the sun’s zenith is at its furthest point from the equator.
‘Solstice’ (Latin: ‘solstitium’) means ‘sun-stopping’. The point on the horizon where the sun appears to rise and set, stops and reverses direction after this day.
The cycle of sunrise, sunset and longest hours of sunlight is interesting. Here in southern Indiana the longest day will be June 17th with sunrise at 6:19 am EDT and sunset at 9:09 pm.
The dates of earliest sunrise here, 6:19 am, are June 9th-17th. Latest sunrise, 9:10 pm, occurs June 21st-July 4th.
Visit the U.S. Naval Observatory website for sunrise/sunset tables for your location.
Go out at sunrise or sunset and note the position of the Sun along your horizon. This time of year it is north of due east and west.
It is also interesting to note how high the Sun’s track is across the sky and, this time of year, the full Moon’s track is lowest.
The panorama of 3 images was taken looking west at sunset. They are, left to right, shots taken in November (was cloudy that December), September at autumnal equinox and June at summer solstice.