Hanukkah is also known as festival of lights. The Hebrew word (also written in English as chanukah) means “dedication” and marks an eight day winter celebration that commemorates the re-dedication of the Second Temple after a small group of Jewish believers (Maccabees) defeated their enemies. More at this link. A “hanukkiah” is basically a menorah with nine candle staff to distinguish it from the menorah’s seven. Why nine? that’s part of the miraculous story.