Tuesday Marks The Longest Day of the Year

You may or may not know that June 21 is the summer solstice. You have probably heard the words summer solstice a few hundred times in your life, but do you actually know what the term means? Let Patch be your dictionary.

On the most basic level, the summer solstice is the first day of summer. Yes that's right, spring does span into June, and high school summer vacation technically starts before the season it is named for.

The reason it's the first day of summer is where defining the solstice becomes a bit complicated. Many people refer to the summer solstice as the longest day of the year. Of course there are no more than 24 hours that separate June 20 and June 22, 2011. It's the sunlight that counts. 

On the day of the summer solstice, the earth's axial tilt is inclined toward the sun more than any other day of the year. Technically speaking, the tilt on this day peaks at 23° 26'. Because of this, there is a maximum of sunlight seconds on the day of the summer solstice.

In Riverdale today, the sun rose at 5:42 a.m. and will set at 8:36 p.m. according to sunrisesunset.com. And although Tuesday should mark the longest day of the year, according to the site Wednesday will be longer by one minute, when the sun sets at 8:37 p.m.

If you're looking to celebrate the exact moment of this year's summer solstice, take your celebratory shot at 1:16 p.m. 

Careful not to mark your calendar for a June 21 celebration every year though, as the solstice can change slightly with our 365-day year not perfectly matching the universe's plan for planetary permutation. Next year, for example, the summer solstice will be on June 20.

So send us a photo of how you spent the first official day of summer at sonia@patch.com. We'll post the images in a gallery on our site Wednesday!