June 21st, 2019 marks the first day of Summer. It is also the day of the Summer Solstice. It occurs when the sun is directly over the Tropic of Cancer, or 23.5 degrees north latitude.
Why do we have a summer solstice, anyway? The Earth orbits around the sun on a tilted axis. So between March and September, Earth’s Northern Hemisphere gets more exposure to direct sunlight over the course of a day. The rest of the year, the Southern Hemisphere gets more, which is why we have seasons.
Take our quiz on the summer solstice and find out some more interesting facts that you may not already know about.