The longest day of the year marks the Beginning of Summer in the Northern Hemisphere which starts on June 20th, 21st or 22nd. It is also known as the Summer Solstice.
Summer Begins on different dates depending on times zones, the latest start date occurring on June 22nd.
HOW TO OBSERVE
Enjoy the first day of summer! Use #SummerBegins to share on social media.
Since ancient times, the summer solstice has been marked on calendars with celebrations honoring the sun and as a way to mark the seasons.