1. Carolina Day: July 6 is celebrated as "Carolina Day" in South Carolina, marking the anniversary of the battle of Sullivan's Island in 1776. This battle saw the South Carolina militia successfully defend the harbor against a British naval attack, boosting morale for the American cause in the Revolutionary War.

2. State flag design: On July 6, 1861, the South Carolina legislature adopted a new design for the state flag, incorporating the palmetto tree and crescent shape still present today. The palmetto tree was a symbol of resilience after the successful defense of Fort Moultrie in the Revolutionary War.

3. Lost submarine found: In 1995, a team discovered the wreckage of the Confederate submarine H.L. Hunley near Charleston on July 6. The Hunley was the first submarine to sink an enemy ship in combat, but was lost during its mission in 1864.

4. Hurricane strikes: July 6 has seen several notable hurricanes strike South Carolina. In 1879, the Charleston Hurricane caused widespread damage and over 100 fatalities. In 1959, Hurricane Gracie caused significant damage to the state's coastline and power outages.

5. Interstate completion: On July 6, 1973, the last section of Interstate 95 was completed in South Carolina, connecting the state to the East Coast's major transportation network. The interstate system brought significant economic growth to the state and facilitated travel and commerce.