When did Greeks pray to Poseidon?

The ancient Greeks prayed to Poseidon, the god of the sea, earthquakes, and horses, particularly during maritime activities, such as before embarking on a voyage, to ensure safe passage and favorable winds. They also invoked him during important events like naval battles and the construction of ships. Additionally, rituals and offerings were made to Poseidon during festivals, such as the Panathenaea, to seek his favor and protection.