This Father's Day weekend brings another, more obscure holiday in the U.S.: Flag Day. Here's what the holiday is and how and when it started.

Flag Day is celebrated every June 14 across the country. Right here in Washington, a state law dictates this flag to fly on the holiday.

A flag resolution was adopted 248 years ago, on June 14, 1777, that said, "Resolved: that the flag of the United States be made of 13 stripes, alternate red and white; that the union be 13 stars, white in a blue field, representing a new constellation," according to the Smithsonian.