1. In 1775, New Hampshire adopted its first state constitution, becoming the first state to do so. The constitution provided for a bicameral legislature and a governor, which was radical for its time.

2. On May 22, 1856, the Republican National Convention was held in Philadelphia, Pennsylvania. At the convention, the first Republican presidential candidate, John C. Fremont, was nominated for president. Fremont carried New Hampshire in the election, but ultimately lost to James Buchanan.

3. On May 22, 1907, the New Hampshire state legislature passed a law making it illegal to sell cigarettes to minors under the age of 18. This law was one of the first of its kind in the United States and helped to pave the way for other states to pass similar legislation.

4. On May 22, 1944, the town of Woodsville, New Hampshire was devastated by a massive flood. The flood was caused by heavy rains and snowmelt, and resulted in the deaths of several residents and the destruction of many homes and businesses.

5. In 1987, the New Hampshire Fish and Game Department released a pair of endangered peregrine falcons into the wild. The falcons, named Merrimack and Manchester, were the first of their kind to be released in the state in over three decades. The release marked the beginning of a successful falcon reintroduction program in New Hampshire, which has resulted in a robust population of the birds in the state.