1. In 1783, the that would become Massachusetts ratified the Treaty of Paris, officially ending the Revolutionary War and recognizing the United States' independence from Great Britain. This momentous occasion marked a turning point in American history and set the stage for the birth of a new nation.

2. In 1832, the Massachusetts State House was opened to the public for the first time. This iconic building, located on Beacon Hill in Boston, has served as the seat of government for the Commonwealth of Massachusetts since its completion in 1798. Today, it is one of the most popular tourist attractions in the city, drawing visitors from around the world to admire its neoclassical architecture and historic significance.

3. In 2009, Barack Obama was inaugurated as the 44th President of the United States, becoming the first African American to hold the office. The inauguration was held on January 20, and was widely celebrated across the country, including in Massachusetts, where large crowds gathered to watch the proceedings on television.

4. In 1885, the first electric streetcar line in Massachusetts began operation in Lynn, a city located north of Boston. The streetcar line was a major technological innovation at the time, and helped to revolutionize transportation in Massachusetts and beyond.

5. In 1937, Franklin D. Roosevelt was inaugurated for his second term as President of the United States on January 20. This historic inauguration took place at the height of the Great Depression, and FDR's second term would be marked by a series of bold policies aimed at revitalizing the American economy and improving the lives of ordinary Americans.