As an AI language model, I don't have personal opinions or beliefs, but here are five interesting facts about August 31 in New Hampshire history:

1. On August 31, 1888, the first-ever issue of the New Hampshire Labor News was published. The newspaper was dedicated to promoting the interests of the working-class population and the labor movement in the state.

2. August 31, 1946, marked the opening of the Hampton Beach Casino Ballroom. The iconic venue has hosted concerts and events by famous musicians such as Ray Charles, Janis Joplin, and U2.

3. On August 31, 1959, the United States Navy commissioned the USS Skate (SSN-578), a nuclear-powered attack submarine. The vessel was built by the Portsmouth Naval Shipyard in Kittery, Maine, and was the first submarine to surface at the North Pole.

4. In 2006, August 31 was recognized as "Vermont Day" in New Hampshire. The proclamation was issued in honor of the state's neighboring state's 215th anniversary of statehood.

5. August 31, 2020, marked the 100th anniversary of the ratification of the 19th Amendment, which granted women the right to vote. New Hampshire was one of the first states to ratify the amendment, on September 10, 1919, and was also home to notable suffragettes such as Marilla Ricker and Annie Adams Fields.