1. On March 30, 1820, the "Connecticut Courant" newspaper reported that the town of Stonington had passed a resolution outlawing the playing of baseball near the town's meeting house. This may be one of the earliest records of baseball being played or discussed in Connecticut.

2. On March 30, 1867, a train derailment occurred near Norwalk, Connecticut, which resulted in the death of over 20 people. It was one of the deadliest accidents in Connecticut's history at the time.

3. In 1943, a group of students and faculty from Trinity College in Hartford, Connecticut, were stranded on top of Mount Katahdin in Maine for 12 days due to bad weather conditions. March 30 was the day they were finally rescued by a group of local guides.

4. On March 30, 1979, the nuclear power plant at Three Mile Island in Pennsylvania experienced a partial meltdown, which led to significant concerns about nuclear safety throughout the United States, including in Connecticut.

5. In 2013, Connecticut Governor Dannel Malloy signed a bill into law that made the state the first in the United States to require labeling of genetically modified food products. The bill was passed on March 30 and marked a significant victory for advocates of food labeling and consumer awareness.