Which ancient Greek poem says Pandora’s jar was opened after she was sent to Epimetheus?

Works and Days says Pandora’s jar was opened after she was sent to Epimetheus. The poem, attributed to Hesiod, is the main ancient literary source for the connected story of Pandora’s creation, marriage, and the release of evils.

The narrative appears within a poem concerned with justice, labor, farming, and the difficult conditions of human life. Pandora’s story helps explain why people must work and why suffering exists, placing the myth inside a broader moral argument rather than presenting it as an isolated adventure.

Hesiod also refers to Pandora in the Theogony, but Works and Days gives the fuller account of her arrival at Epimetheus’s home and the opening of the vessel. The two poems therefore should not be treated as interchangeable versions with identical wording.

The title is sometimes shortened incorrectly to “Days and Works.” The canonical English title is Works and Days, a translation of the Greek Erga kai Hēmerai.