1. On December 29, 1782, the first American state law regulating the dairy industry was passed in Connecticut. This law set standards for milk production and required dairy farmers to meet certain health and safety requirements.

2. In 1845, the first railroad to connect New York City to Hartford, Connecticut was completed. The line was known as the New York and New Haven Railroad and revolutionized transportation in the state.

3. On December 29, 1853, the first successful electric telegraph cable was laid across Long Island Sound, connecting Brooklyn, New York to New Haven, Connecticut. This allowed for nearly instantaneous communication between the two cities.

4. December 29, 1890, marks the birth of Connecticut native Charles Baskerville, who was the inspiration for the character of Sherlock Holmes' Baskerville in the Sir Arthur Conan Doyle novel "The Hound of the Baskervilles".

5. In 2003, Connecticut Governor John Rowland resigned from office on December 29 amid a corruption scandal. He was the first Connecticut governor to ever resign from office.