1. On January 23, 1785, the Connecticut Courant, one of the oldest continuously published newspapers in the United States, reported on the state's ratification of the United States Constitution.

2. In 1845, January 23 marked the first time that a train crossed into Connecticut on the new Housatonic Railroad, linking the state with others in the northeast and ultimately the rest of the country.

3. On January 23, 1896, the Yale University swimming team competed in its first-ever intercollegiate meet, resulting in a tie against Columbia.

4. In 1973, the Connecticut Supreme Court ruled on a landmark case on educational equity known as Horton v. Meskill, which challenged disparities between the state's suburban and urban school districts.

5. January 23, 2021, marked the opening day of Connecticut's COVID-19 vaccination program for individuals age 75 and older, a major milestone in the state's ongoing efforts to combat the pandemic.