1. Flag Day: June 14th is celebrated as Flag Day in the United States. On this day in 1777, the Second Continental Congress adopted the Stars and Stripes as the official flag of the newly formed nation. The flag was designed by Betsy Ross, a Philadelphia seamstress, and has since become a symbol of American patriotism and national pride.

2. New York's First Public Park: On June 14th, 1847, New York City's first public park, Bryant Park, was opened to the public. Located in Midtown Manhattan, the park was originally named Reservoir Square after the nearby Croton Distributing Reservoir. Today, the park is a popular spot for picnics, outdoor concerts, and cultural events.

3. Assassination Attempt: On June 14th, 1856, a man named Samuel Yates attempted to assassinate Mayor Fernando Wood of New York City during a public speech. Yates fired two shots at Wood, but missed both times. He was quickly apprehended by police and later found guilty of attempted murder.

4. First Subway Line: On June 14th, 1900, the first subway line in New York City opened to the public. The line ran from City Hall to Harlem and was operated by the Interborough Rapid Transit Company. The subway quickly became a popular mode of transportation and helped to alleviate congestion on the city's streets.

5. LGBT Rights: On June 14th, 2011, New York became the sixth state to legalize same-sex marriage. The Marriage Equality Act was signed into law by Governor Andrew Cuomo, and allowed gay and lesbian couples to wed and enjoy the same legal protections and benefits as heterosexual couples. The law was a significant victory for the LGBT community and sparked similar efforts in other states.