The Fire in the Sky Festival is an event mentioned in Shadow the Hedgehog. It is a festival held by the people of Westopolis and its surrounding areas where they celebrate the time when the Black Comet is seen in the sky near earth every fiftieth year.
Little is known about the nature of the celebration and how far back it goes. Recently, the Fire in the Sky Festival was scheduled to be held when the Black Arms, the very residents of the Black Comet, invaded the earth.
With the destruction of the Black Comet, it can be assumed that this celebration is no longer in practice.