1. Maine commemorates the United States Constitution on September 15: The state of Maine has been observing September 15 as a celebrated day since 1789. The day marks the signing of the United States Constitution back in 1787.

2. Katahdin Woods and Waters National Monument were officially created on September 15, 2016: On this day, then-president Barack Obama created the Katahdin Woods and Waters National Monument in Maine. The park is over 87,000 acres and is located in northern Maine. It includes Mount Katahdin, the highest peak in Maine.

3. John Ford, famous film director, was born on September 15, 1894, in Cape Elizabeth, Maine: He was a renowned director, credited with directing over 140 films. Some of his famous works include "The Grapes of Wrath,” "The Informer," and "The Quiet Man."

4. The Maine Maritime Academy was founded on September 15th, 1941: The Maine Maritime Academy started operations in 1941 as the Maine Maritime Academy Training Ship State of Maine sailed off on its first voyage. It grants undergraduate degrees in marine engineering, marine transportation, marine science, and other maritime-related fields.

5. The Great Fire of 1914 in Salem, Maine: On September 15, 1914, a fire broke out in Salem, Maine, that destroyed nearly 60 buildings in the town, resulting in a loss of $100,000. The fire started from faulty wiring in a power plant in downtown Salem. The damage could have been worse if not for firefighters from nearby towns who came to help put out the blaze.