June 21st is the longest day of the year in the Northern Hemisphere because it is the summer solstice, which describes the tilt of the Earth's axis. This phenomenon is only observable outside of the tropics as it is the tilt of the Earth that alters the duration of light exposure of any one point on the surface.Is June 21 The Longest Day of the year?
21 JUNE - LONGEST DAY OF THE YEAR. For those living to the Northern Hemisphere, June 21 is the longest day of the year. Since the Earth rotates on the axis, the North of the Equator receives more direct sunlight between the month of March and September, hence Summer is experienced during the time.What season begins on June 21 in the southern hemisphere?
In the Northern Hemisphere, spring begins about March 21, summer about June 21, autumn about September 23, and winter about December 22. In the Southern Hemisphere, it is autumn that begins in March and spring that begins in September.