SuetoniusVitellius 3: "was born on the eighth day before the Kalends of October [24 September], or according to some, on the seventh day before the Ides of September [7 September]". 24 September is generally the most accepted date.[1]
Tacitus (III) records the defection of his troops on 18 December and the taking of the capitol the following day. Cassius Dio (64.22) indicates that he died a day later, although his calculations indicate that he died on the 22nd, not 20.
