1. The New Hampshire Historical Society was established on December 9, 1823. The organization was created to collect and preserve the history of New Hampshire and its residents. Today, the society operates a museum, library, and research center in Concord.

2. On December 9, 1840, the state's first state normal school opened in Concord. The school aimed to provide teacher education, and over time it has become the University of New Hampshire.

3. The first chartered public library in the United States was opened in Peterborough, New Hampshire, on December 9, 1833. The library was called the Peterborough Town Library, and it is still in operation today.

4. On December 9, 1864, Major General William F. "Baldy" Smith, a New Hampshire native, was relieved of his command during the Siege of Petersburg. Smith was known for his tactical skills but was removed from his command due to insubordination.

5. The New Hampshire Supreme Court issued its decision in the landmark case of Claremont v. Governor of New Hampshire on December 9, 1997. The case centered on the state's education funding system and whether it violated the state constitution's requirement for providing an "adequate education" to all children. The court's decision profoundly altered the state's education funding system and remains a significant legal case.