1. On January 26, 1788, the Massachusetts State Constitution was ratified, making it the oldest functioning written constitution in the world.

2. On January 26, 1837, Michigan was admitted to the union as the 26th state, which had a significant impact on Massachusetts as it lost a significant amount of land to the new state.

3. In 1901, on January 26, Mary Channing Coleman became the first woman in Massachusetts to be admitted to practice law after passing the state bar exam.

4. On January 26, 1949, the basketball team of Holy Cross College beat the University of Kentucky, which was one of the most remarkable sports upsets in history.

5. In 2003, on January 26, the first same-sex marriage licenses were issued in Massachusetts, making it the first state to legalize same-sex marriage in the United States.