THE JUNE SOLSTICE
In the Northern Hemisphere, the June solstice (aka summer solstice) occurs when the Sun reaches its highest and northernmost points in the sky. This event marks the start of summer in the northern half of the globe. (In the Southern Hemisphere, it’s the opposite: the June solstice marks the start of winter, when the Sun is at its lowest point in the sky.)
WHEN IS THE SUMMER SOLSTICE?
In 2021, the June solstice is Sunday, June 20, at 11:32 P.M. EDT. This date marks the official beginning of summer in the Northern Hemisphere, occurring when Earth arrives at the point in its orbit where the North Pole is at its maximum tilt (about 23.5 degrees) toward the Sun, resulting in the longest day and shortest night of the calendar year. (By longest “day,” we mean the longest period of sunlight.) At the June solstice, the Northern Hemisphere receives sunlight at the most direct angle of the year.