1. On September 3, 1783, the Treaty of Paris was signed, officially ending the Revolutionary War and recognizing the United States as an independent nation. New Hampshire played a significant role in the war effort, with prominent figures such as John Stark and John Sullivan leading troops in key battles.

2. In 1833, the first railroad in New Hampshire, the Boston & Maine Railroad, was chartered. This company would go on to become one of the largest and most influential railroads in the region, connecting New Hampshire with major cities and shipping hubs throughout the northeast.

3. On September 3, 1917, New Hampshire native Charles Emerson Hovey was killed in action during World War I. Hovey was a member of the famous Lafayette Escadrille, a group of American pilots who fought for the French Air Force before the United States officially entered the war. He is buried in France, and his story is commemorated in a memorial in Mont Vernon, New Hampshire.

4. The first-ever Labor Day parade in New Hampshire took place on September 3, 1888, in Manchester. This event was organized by the Knights of Labor, a prominent labor union at the time, and drew thousands of participants from across the state.

5. In 1971, the New Hampshire State Lottery held its first drawing on September 3. The lottery has since grown into a major source of revenue for the state, funding government programs and initiatives in areas such as education, transportation, and public safety.