January 13. January 13 is the 13th day of the year in the Gregorian calendar; 352 days remain until the end of the year (353 in leap years). Events Pre-1600 27 BC ??? Octavian transfers the state to the free disposal of the Roman Senate and the people. He receives Spain, Gaul, and Syria as his province for ten years. 532 ??? The Nika riots break out, during the racing season at the Hippodrome in Constantinople, as a result of discontent with the rule of the Emperor Justinian I. 1435 ??? Sicut Dudum, forbidding the enslavement by the Spanish of the Guanche natives in Canary Islands who had converted, or were converting to, Christianity, is promulgated by Pope Eugene IV. 1547 ??? Henry Howard, Earl of Surrey, is sentenced to death for treason, on the grounds of having quartered his arms to make them similar to those of the King, Henry VIII of England....