1. Flag Day: On June 14, 1777, the Continental Congress adopted the design of the American flag, which features 13 stripes and 13 stars in a circle on a blue field. June 14th is celebrated as Flag Day in Massachusetts and across the United States.

2. First Public Beach: Revere Beach, located in Revere, Massachusetts, officially opened on June 14, 1896, and became the first public beach in the United States. The beach was a popular destination for families and tourists throughout the 20th century and still attracts visitors today.

3. First Child Labor Law: On June 14, 1842, the Massachusetts legislature passed a law regulating child labor. The law stipulated that children under 12 could not work in factories, and children between 12 and 18 could only work ten hours a day. This was one of the first child labor laws in the United States.

4. First Lighthouse: The Boston Light, located on Little Brewster Island in Boston Harbor, was the first lighthouse in America. It began operation on June 14, 1716, and is still in service today. The Boston Light was added to the National Register of Historic Places in 1967.

5. Birth of Margaret Fuller: Margaret Fuller, a feminist writer and social reformer, was born in Cambridge, Massachusetts, on June 14, 1810. She was a key figure in the Transcendentalist movement and one of the first women to work as a journalist in the United States. Fuller's book "Woman in the Nineteenth Century" is considered a classic of feminist literature.