1. On May 20, 1636, a group of Puritans arrived on the shores of Maine and established the town of York. The settlement became an important trade center and played a significant role in the region's early history.

2. In 1854, the first steam sawmill in eastern Maine was established in the town of Bucksport. The mill not only revolutionized the logging industry but also spurred the growth and development of the surrounding area.

3. On May 20, 1927, Charles Lindbergh landed his plane, the Spirit of St. Louis, in Portland, Maine, as part of his historic transatlantic flight. The landing was a significant moment in aviation history and drew large crowds to the city.

4. In 1983, Maine became the first state in the country to ban smoking in public places. The law, which was initially controversial, has since been adopted by many other states and countries around the world.

5. On May 20, 1993, a group of whale watchers off the coast of Maine spotted a rare and elusive North Atlantic right whale. The sighting was significant because the species is critically endangered, with only a few hundred individuals left in the world. Conservation efforts have since been launched to protect the remaining whales and their habitat.