• Major Wu Hu (barbarian) uprising in China; the Hun Liu Yuan establish the Han kingdom, beginning the Sixteen Kingdoms era in China.
• Fincormachus becomes king of Scotland.
• Diocletian contracts a fatal illness.

Births

Deaths

• Saint Agnes, Christian saint (martyred)
• Adrian of Nicomedia, Christian saint (or 303) (martyred)
• Pope Marcellinus on October 25 (martyred)
• Alban (possibly 309)
• Saint Lucie of Syracuse[?], Christian saint (martyred)