LOS ANGELES - While it may already feel like summer, the first official day of the season officially kicks off Sunday, when many cultures from around the world celebrate and recognize the significance of the summer solstice.
But what is the summer solstice and why is it the longest day of the year? Here are some facts about the significant day.The summer solstice, which also marks the onset of summer, occurs when one of the Earth’s poles has its maximum tilt toward the sun.This occurs twice yearly, once in each hemisphere. RELATED: PHOTOS: Saharan dust brings beautiful skies to FloridaFor example, the summer solstice happens between June 20-22 in the northern hemisphere and between December 21-22 in the southern hemisphere (which the U.S..