1. On May 20, 1885, the first train of the Mount Washington Cog Railway ascended to the summit of Mount Washington, the highest peak in New Hampshire. This railway is still in operation today, offering breathtaking views of the surrounding White Mountains.

2. May 20, 1932, marked the day when Charles Lindbergh landed his plane in Manchester, NH, on his way to New York. Lindbergh, famous for his solo flight across the Atlantic Ocean in 1927, was met by a cheering crowd and given a warm welcome in the Granite State.

3. In 1977, on May 20, a major fire tore through the historic Parker Hotel in downtown Manchester, NH. Despite the efforts of hundreds of firefighters, the building was destroyed, leaving a large void in the city's historical landscape. The cause of the fire was never fully determined.

4. May 20, 2004, saw the opening of the Hood Museum of Art at Dartmouth College in Hanover, NH. With a collection of over 65,000 works of art spanning over 5,000 years of human history, the museum has become a major cultural institution in the region.

5. On May 20, 2013, the New Hampshire House of Representatives voted to legalize gay marriage, becoming the 17th U.S. state to do so. The law went into effect on January 1, 2014, making New Hampshire one of the first states in the country to legalize same-sex marriage through the legislative process.