1. Delaware ratified the U.S. Constitution on June 22, 1787. Delaware was the first state to ratify the Constitution and is often referred to as the "First State."

2. The famous du Pont family arrived in Delaware on June 22, 1800, after fleeing France during the French Revolution. The family has been instrumental in the development of Delaware's economy, particularly in the chemical industry.

3. On June 22, 1832, the African Methodist Episcopal Church was incorporated in Wilmington, Delaware. This church played a significant role in the abolitionist movement and the fight for civil rights.

4. Dover International Speedway, also known as "The Monster Mile," hosted its first NASCAR race on June 22, 1969. The track has since become a popular destination for racing enthusiasts.

5. On June 22, 1978, Delaware Governor Pierre S. du Pont IV signed the Coastal Zone Act. This landmark legislation has helped to protect Delaware's coastal areas from industrial development and preserve them for future generations.