|Millennium:||1st millennium BC|
|Centuries:||6th century BC – 5th century BC – 4th century BC|
|Decades:||460s BC 450s BC 440s BC – 430s BC – 420s BC 410s BC 400s BC|
|Years:||433 BC 432 BC 431 BC – 430 BC – 429 BC 428 BC 427 BC|
- Plague of Athens an epidemic which hit the city-state of Athens in ancient Greece during the second year of the Peloponnesian War.
- Euripides wrote the play Alcestis
- Zeno of Elea died about 430 BC