This year, the solstice coincides with a Strawberry Moon.
Summer solstice occurs when the sun reaches the northernmost limit in its path in the sky, Baker explained, adding that solstice means "sun-stopping".
Though today might be the longest day of the year, it likely won't be the hottest. The days will get shorter beginning Tuesday until December the 21st, the winter solstice.
According to a story published on the topic by Treehugger, "The summer solstice isn't a rare event, a full moon even less so".
It won't happen again until June 2062.
While we'll be witnessing the summer solstice in the Northern Hemisphere, the Southern Hemisphere will observe the winter solstice. Then there's Alaska, where the sun is up for 18 hours or more across large portions of the Last Frontier.
In modern times, International Surfing Day - a very sunny sport - is celebrated on Summer Solstice. How can the Summer Solstice be the First Day of Summer and Midsummer at the same time?