June, named after Juno -- the goddess of marriage -- is the sixth month of the year and one of four months in the year with a length of 30 days. June also boasts the longest daylight hours of the year. Holidays include Flag Day and Father's Day. Summer officially kicks off on June 21, and the Summer Solstice falls on this month as well. Did you know there's a June beetle? Named after the month of June, it's only seen in May and June in the U.S. Gemini and Cancer are the two Zodiac signs that fall in the month of June, with the birthstones being Alexandrite, Moonstone, and Pearl. Here are some noteworthy historic events that took place in the month of June: June 3, 1539: De Soto claims Florida for Spain June 20, 1782: Congress adopts the design for the Great Seal of the United States June 20, 1793: Eli Whitney applies for a patent on the cotton gin June 15, 1844: Charles Goodyear is granted a patent for rubber vulcanization  June 20, 1867: President Andrew J...