1. Maine became the 23rd state on June 12, 1820. This was a significant moment in Maine's history, as it marked the state's official recognition as an independent political entity.

2. The town of Rockland, Maine, was officially incorporated on June 12, 1854. Today, Rockland is known for its beautiful harbor, lobster fishing industry, and vibrant arts community.

3. On June 12, 1963, Governor John H. Reed signed a bill establishing the University of Maine System. This was a major milestone in Maine's higher education history, as it brought together several previously separate institutions under one umbrella.

4. The largest recorded earthquake in Maine's history occurred on June 12, 1904. The earthquake, which had a magnitude of 5.1, caused significant damage to buildings and infrastructure throughout the state.

5. June 12 is also recognized as International Chickadee Day, a celebration of Maine's state bird. The black-capped chickadee is a year-round resident of Maine's forests and is known for its distinctive "chick-a-dee" call.