Every year on December 7th the beacon on top of Mount Diablo - the "Eye of Diablo" - is lit at sunset in a ceremony honoring the survivors of the attack on Pearl Harbor. The beacon remains lit throughout the night and is extinguished at sunrise for the remainder of the year. Save Mount Diablo is a sponsor of the event and has taken on the responsibility of restoring the beacon. December 7th also happens to be the anniversary of Save Mount Diablo's founding in 1971.
The "Eye of Diablo"