October 4 is the 277th day of the year (278th in leap years) in the Gregorian calendar; 88 days remain until the end of the year. == Events == === Pre-1600 === AD 23 – Rebels sack the Chinese capital Chang'an during a peasant rebellion. 1209 – Otto IV is crowned Emperor of the Holy Roman Empire by Pope Innocent III. 1302 – The Byzantine–Venetian War comes to an end. 1363 – Battle of Lake Poyang: In one of the largest naval battles in history, Zhu Yuanzhang's rebels defeat rival Chen Youlian…