1. Atlanta's "Zero Mile Post" was established on June 30, 1850, marking the official beginning of the Western & Atlantic Railroad. This railroad was a major transportation hub for the state of Georgia and played a pivotal role in the Civil War.

2. On June 30, 1886, the Statue of Liberty was dedicated in New York Harbor. Although this may not seem directly related to Georgia history, it is significant because the copper used to construct the statue's exterior came from a mine in the town of Copperhill, which is located on the Georgia-Tennessee border.

3. In 1971, on June 30, the Supreme Court of the United States ruled in the landmark case Lemon v. Kurtzman. This decision established the "Lemon Test," which outlines the criteria for determining whether government funding of religious schools and organizations is constitutional.

4. On June 30, 1978, a Boeing 727 crashed shortly after taking off from Hartsfield-Jackson Atlanta International Airport. All 144 passengers and crew members onboard were killed, making it the deadliest aviation accident in Georgia history.

5. June 30, 1985, marks the date that Coca-Cola reintroduced "Classic Coke" after a failed attempt to rebrand as "New Coke" earlier that year. The decision to revert to the original formula was made in response to public outcry, cementing Coke's status as a beloved brand worldwide.