Decades: 470s BC 460s BC 450s BC 440s BC 430s BC - **420s BC** - 410s BC 400s BC 390s BC 380s BC 370s BC

Years: 425 BC 424 BC 423 BC 422 BC 421 BC - **420 BC** - 419 BC 418 BC 417 BC 416 BC 415 BC

**Deaths**

- Herodotus, Greek historian (approximate year)