1. On December 20, 1832, the New Hampshire state legislature voted to require school attendance of at least three months per year. This was a progressive move at the time, as many children in rural areas did not have access to school.

2. In 1898, on December 20th, the state of New Hampshire celebrated the 100th anniversary of its statehood. Events and festivities were held throughout the state to mark the occasion.

3. December 20, 1957, was the day that the first nuclear reactor in New Hampshire went online. The reactor, located at the Portsmouth Naval Shipyard, provided power for the shipyard and other military installations.

4. The town of Hanover, New Hampshire, was incorporated on December 20, 1761. It is home to Dartmouth College and has a rich history dating back to colonial times.

5. On December 20, 1977, the legendary New Hampshire folk musician, Tom Rush, played a concert at the Capitol Center for the Arts in Concord. Rush, who was born in Portsmouth, has been a fixture of the music scene in New England for over 50 years.