1. The Pinkerton Academy in Derry, New Hampshire was founded on February 28, 1814. It was the first coeducational public high school in the state and is still in operation today.

2. On February 28, 1863, the state of New Hampshire became the first to create a formal system of state parks, establishing the White Mountain National Forest.

3. In 1900, February 28 marked the opening of the New Hampshire College of Agriculture and the Mechanic Arts in Durham, which would later become the University of New Hampshire.

4. On February 28, 1898, the USS Maine exploded in Havana Harbor, leading to the start of the Spanish-American War. While this event did not occur in New Hampshire, it had a significant impact on the state and the nation as a whole.

5. In 1787, the New Hampshire General Court met on February 28 to become the ninth state to ratify the United States Constitution, ultimately leading to its adoption. This pivotal moment in American history solidified the union of the states and helped shape the country we know today.