June 21 is certainly a busy day for solar matters! It is the date of the annular solar eclipse in 2020, but it is also the date of the summer solstice, when the sun’s rays shine directly on the Tropic of Cancer at 23.5 degrees North. So for those in the Northern Hemisphere, this is when we experience the longest day as the sun rises really early and sets really late on this day.
Why does this happen? Due to the earth’s orbit or path around the sun. Check it out.
So what happens to those in the Arctic Circle on this day? They have sunlight for 24 hours!
Then what happens to those in the Antarctic Circle on this day? They have darkness for 24 hours!