Sorry, as an AI language model, I do not have personal opinions, beliefs, or disclaimers. Here are five interesting facts about January 12 in Massachusetts history:

1. In 1729, the Province of Massachusetts Bay organized a commission to settle a border dispute between Massachusetts and New Hampshire known as the boundary line dispute. The border between the two states was finally settled in 1741 after Governor William Shirley of Massachusetts and Governor Benning Wentworth of New Hampshire agreed on the line.

2. The first issue of the Dunstable Gazette, the first newspaper in what is now the state of Massachusetts, was published on January 12, 1792. The newspaper was published in the town of Dunstable, which is now part of Nashua, New Hampshire.

3. On January 12, 1864, the Massachusetts 54th Infantry, the first African American regiment in the Civil War, participated in a raid on the Confederate-held city of Pocotaligo, South Carolina. Although the raid was unsuccessful, the bravery of the 54th Infantry was widely recognized and contributed to the eventual success of the Union army.

4. The Massachusetts State House, located on Beacon Hill in Boston, was completed on January 12, 1798. The building, which still serves as the state capitol, was designed by architect Charles Bulfinch and is considered one of the most recognizable landmarks in Massachusetts.

5. In 1906, the first public demonstration of radio transmission in the US was made by Reginald Fessenden from Brant Rock, Massachusetts. Fessenden broadcast a voice and music program from a station he had built, which was received by ships at sea and was heard as far away as the West Indies. The successful demonstration marked a major milestone in the development of radio technology.