Decades: 450s BC 440s BC 430s BC 420s BC 410s BC - **400s BC** - 390s BC 380s BC 370s BC 360s BC 350s BC

Years: 405 BC 404 BC 403 BC 402 BC 401 BC - **400 BC** - 399 BC 398 BC 397 BC 396 BC 395 BC

- Carthaginians occupy Malta

- Kidinnu, Chaldean astronomer (approximate year)