1. On April 27, 1791, the town of Bristol was established. It was named after Bristol Borough in Bucks County, Pennsylvania, which had been the hometown of many of its original settlers.

2. In 1861, on April 27, the Connecticut State Legislature voted to authorize the formation of the First Connecticut Volunteer Infantry Regiment, which would go on to fight in the American Civil War.

3. On April 27, 1904, the Connecticut State Capitol building was completed after three years of construction. It was designed by architect Richard M. Upjohn in the Beaux-Arts style.

4. In 1946, on April 27, the Hartford circus fire occurred, claiming the lives of 168 people and injuring over 700. It was one of the worst public disasters in Connecticut history.

5. On April 27, 2015, the Supreme Court of the United States ruled in favor of Connecticut in the case of Rodriguez v. United States, which challenged the state's authority to impose a secondary criminal penalty on those who refuse DUI testing. The ruling affirmed Connecticut's position and bolstered their ability to enforce drunk driving laws.