1. On September 6, 1776, the town of Portsmouth, New Hampshire declared its independence from Great Britain. This made it one of the first towns in the American colonies to take such action and helped to inspire similar declarations throughout the region.

2. In 1838, the New Hampshire State Hospital for the Insane (now known as the New Hampshire Hospital) opened in Concord. It was one of the first public mental health hospitals in the United States and played an important role in the treatment of mental illness in New Hampshire.

3. On September 6, 1886, the Winnipesaukee River Railroad was incorporated. This short-line railroad served the Lakes Region of New Hampshire and was instrumental in the region's economic development in the late 19th and early 20th centuries.

4. In 1923, the New Hampshire State Highway Department was established. This organization, now known as the New Hampshire Department of Transportation, is responsible for the planning, construction, and maintenance of the state's transportation infrastructure.

5. On September 6, 1970, the New Hampshire International Speedway (now known as the New Hampshire Motor Speedway) held its first race. The speedway has since become a major venue for NASCAR and other motorsports events, attracting thousands of visitors to the state each year.