1. The Maine State Capitol's cornerstone was laid on December 5, 1829. The Capitol building is located in Augusta, Maine and is home to the Maine State Legislature, the Office of the Governor, and other state agencies. The cornerstone laying ceremony was a significant event in Maine's history, as it symbolized the state's growing political power and influence.

2. On December 5, 1876, the Portland Water Company was founded. The Portland Water Company is responsible for providing clean and safe drinking water to the residents of Portland, Maine. The company has played a vital role in ensuring public health and safety in the city for over 140 years.

3. The Maine Air National Guard's 101st Air Refueling Wing was activated on December 5, 1975. The 101st Air Refueling Wing is based out of Bangor, Maine and is responsible for aerial refueling missions across the world. The wing has played a vital role in military operations since its activation, including supporting air operations during the Gulf War and the War in Afghanistan.

4. The Maine Discovery Museum, located in Bangor, Maine, opened its doors on December 5, 2001. The Maine Discovery Museum is a children's museum that features interactive exhibits, educational programs, and hands-on learning opportunities for children of all ages. Since its opening, the museum has become a popular destination for families and school groups throughout Maine.

5. On December 5, 2012, Maine became the first state in the country to legalize same-sex marriage through a popular vote. The referendum, known as Question 1, passed with over 53% of the vote. The passage of Question 1 was a significant milestone in the state's history, as it represented a shift in public opinion towards LGBTQ+ rights and equality.