1. In 1783, Maine becomes a district of Massachusetts: On February 18, 1783, the Massachusetts General Court passed an act that created the District of Maine, which included the present-day states of Maine and parts of Vermont and New Hampshire. Maine remained a part of Massachusetts until it gained statehood in 1820.

2. Maine Statehood Centennial: February 18, 1920, marked the centennial of Maine's statehood, commemorated by a grand celebration with parades, speeches, and special events across the state.

3. "Maine's Night to Howl": In 1933, on February 18, Maine Governor Joseph E. Brennan declared "Maine's Night to Howl," urging citizens to speak up and demand better representation in the federal government. The protest came amidst the Great Depression, which hit Maine especially hard, and aimed to raise awareness of the state's economic struggles.

4. First Maine-made submarine: On February 18, 1941, the Portsmouth Naval Shipyard in Kittery launched the first Maine-built submarine, the USS Sicklefish. The Sicklefish served in World War II and the Korean War before being decommissioned in 1971.

5. Colby College celebrates its bicentennial: On February 18, 2013, Colby College in Waterville, Maine celebrated its bicentennial, marking 200 years since its founding. The college hosted a series of events throughout the year, including a lecture series, exhibits, and performances. Colby is one of Maine's oldest liberal arts colleges and has played a significant role in the state's intellectual and cultural history.