Coca-Cola was invented in May 1886 by Dr. John S. Pemberton in Atlanta, Georgia. Georgia was the first state to allow 18-year-olds to vote. Of the states entirely east of the Mississippi River, Georgia is the largest in land area. Countryaah.com: Offers a full list of nationwide and statewide holidays in Georgia starting from January 1st – New Year’s Day. Also covers the most recent three years of public holidays within the state of Georgia.