1. In 1905, the New Hampshire State Fair opened in Rochester for the first time. The fair continues to be held each September and is one of the oldest state fairs in the country.

2. On September 1, 1923, the Mount Washington Cog Railway set the world record for the fastest climb up the mountain, completing the ascent in just 57 minutes and 31 seconds.

3. The state's first public university, the University of New Hampshire, opened its doors on September 1, 1866. Today, UNH is consistently ranked as one of the top public universities in the country.

4. On September 1, 1945, the Portsmouth Naval Shipyard launched the USS Carbonero, a Balao-class submarine that served in the Pacific during World War II and was later used in the Korean and Vietnam Wars.

5. In 1912, New Hampshire became the first state to complete a presidential primary election, which was held on September 6 of that year. The state has continued to hold its first-in-the-nation primary ever since, helping to shape presidential elections for over a century.