The month of August (Latin: "Augustus") is named after Augustus; until his time it was called "Sextilis" (named so because it had been the sixth month of the original Roman calendar and the Latin word for six is "sex"). Commonly repeated lore has it that August has 31 days because Augustus wanted his month to match the length of Julius Caesar's July, but this is an invention of the 13th century scholar Johannes de Sacrobosco. Sextilis in fact had 31 days before it was renamed, and it was not chosen for its length (see Julian calendar). 