1. On March 11, 1941, African American lawyer and civil rights activist Louis L. Redding argued before the Delaware Supreme Court in the case of Burton v. Wilmington Parking Authority, which challenged the segregated nature of public facilities in the state. The court ultimately ruled in favor of Redding's argument, marking a significant victory for the civil rights movement in Delaware.

2. March 11, 1813 saw the formation of the Delaware Academy of Fine Arts, which provided educational opportunities in the visual arts for residents of the state. The Academy would later evolve into the Delaware College of Art and Design, which remains a prominent institution in the state today.

3. On March 11, 1982, the U.S. Environmental Protection Agency (EPA) designated a portion of the Delaware River as an estuarine sanctuary, creating the Delaware Estuary National Wildlife Refuge. This designation recognized the unique ecological value of the river and helped to promote preservation efforts in the region.

4. The state legislature of Delaware meets annually on the second Tuesday of March, including March 11. This day is often marked by important legislative actions and policy discussions.

5. On March 11, 1956, the city of Wilmington, Delaware was hit by a massive blizzard that brought more than 27 inches of snow to the area. This storm remains one of the most significant weather events in the state's history, causing widespread disruption and damage to infrastructure.