1. Delaware became the first state to ratify the 13th Amendment on January 31, 1865. This amendment abolished slavery and involuntary servitude in the United States.

2. On January 31, 1932, the DuPont Company introduced a new synthetic material called "nylon" at a trade show in New York. Nylon would go on to revolutionize the textile industry and become a staple material in various industries.

3. The Delaware Memorial Bridge, connecting Delaware and New Jersey over the Delaware River, opened on January 31, 1951. At the time, it was the longest suspension bridge in the world.

4. On January 31, 1964, Delaware Senator J. Caleb Boggs introduced the Civil Rights Act of 1964 to the US Senate. The act aimed to end discrimination based on race, color, religion, sex, or national origin.

5. In 2010, a record-breaking snowstorm hit Delaware on January 31, dumping over 20 inches of snow across the state. The blizzard caused power outages, closed roads, and forced several businesses and schools to shut down for days.