1. In 1766, New Hampshire Governor John Wentworth signed a warrant for the town of Plymouth to establish a public library, which is still operational to this day. It is currently the oldest public library in the United States.

2. On March 18, 1829, New Hampshire became the first state in the US to have a woman as its sole representative in Congress. Emma D. Snodgrass was appointed as a member of the House of Representatives.

3. In 1865, the 12th New Hampshire Volunteer Infantry Regiment fought in the Battle of Fort Stedman during the American Civil War. The regiment suffered heavy casualties but ultimately played a crucial role in Union forces retaking the fort from Confederate troops.

4. On March 18, 1937, the New Hampshire State House was officially dedicated. The building, which is the oldest state capitol in the country in which the legislature still meets in its original chambers, was designed by renowned architect Stuart James Park and constructed over a period of 33 years.

5. The March 18, 1970 issue of the Dartmouth College student newspaper featured an editorial advocating for the legalization of marijuana. The editorial sparked a heated debate on campus and garnered national attention, ultimately leading to a change in attitudes towards the drug across the country.