As the earth revolves around the sun, the north pole is tilted toward the sun half the year and the south pole is tilted toward the sun the other half. Today is the day with the longest period of daylight because the sun takes its longest path through the sky. In the Northern Hemisphere the summer solstice always falls on June 20th, 21st or 22nd.
The winter solstice, the shortest day of the year, takes place between December 21st and December 23rd. This occurs when the north pole is at maximum tilt away from the sun.
The name "solstice" is derived from the Latin word "solstitium," which is a combination of sol (sun) and stitium (stand still). Some people say the sun appears to stand still on the solstice.
Now that it's officially summer, have you enrolled in the Summer of Reading Program?
Here are some fun books about summer to kick start your reading. Don't forget about audiobooks for those road trips.
Mouse's First Summer by Lauren Thompson
Summer is Summer by Phillis and David Gershator
Hooray for Summer by Kazuo Iwamura
Summer Days and Nights by Wong Herbert Yee
Summer Wonders by Bob Raczka
Pond Walk by Nancy Elizabeth Wallace
Now It Is Summer by Eileen Spinelli
The Jellybeans and the Big Camp Kickoff by Laura Numeroff and Nate Evans
Summer at Forsaken Lake by Michael Beil
Glory Be by Augusta Scattergood
Summer in the City by Marie-Louise Gay
Summer of the Gypsy Moths by Sara pennypacker
The Lemonade War by Jacqueline Davies
The Sasquatch Escape by Suzanne Selfors
The Penderwicks: A Summer Tale of Four Sisters, Two Rabbits, and a Very Interesting Boy by Jeanne Birdsall
Charlie Joe Jackson's Guide to Summer Vacation by Tommy Greenwald