What is the festival of Athena and Hephaestus called?

The festival of Athena and Hephaestus is known as the Panathenaea. It was one of the most important religious festivals in ancient Athens, celebrated annually in honor of the goddess Athena, the city's patron deity, and included athletic competitions, musical contests, and a grand procession. The festival featured offerings and sacrifices, particularly to Athena, and culminated in the presentation of a new peplos, or robe, to her statue in the Parthenon.