1. On February 20, 1791, the town of Killingly became the last town in Connecticut to be incorporated. Killingly was originally settled around 1700 by European colonists and was home to the Nipmuck people before that.

2. In 1815, on February 20th, the Connecticut General Assembly passed a bill establishing a $10,000 fund for the education of deaf and mute children. This was the first such fund in the United States and was a major step forward in the education and treatment of individuals with hearing and speech impairments.

3. On February 20th, 1839, Connecticut Governor William Ellsworth signed into law the first state statute prohibiting dueling in the United States. Dueling, the practice of individuals resolving disputes through armed combat, was common in early America and was widely criticized by many individuals and groups.

4. In 1878, on February 20th, the town of Suffield was devastated by a tornado that killed two people, injured dozens, and caused significant damage to homes and businesses. The tornado, which was estimated to be an F3 on the Fujita scale, was one of the deadliest in Connecticut history.

5. On February 20, 1976, Connecticut Governor Ella T. Grasso signed into law a bill establishing the Connecticut Commission on the Arts. The commission was created to promote the arts in Connecticut and to provide support for artists, arts organizations, and cultural events throughout the state. Today, the commission is known as the Connecticut Office of the Arts and continues to play a vital role in the state's cultural life.