Well, Hanukkah is a Jewish Holiday, also known as the Feast of Lights.
It is not as famous or as well known as the other Jewish Holidays such as Passover, etc. But it is a very interesting and important Holiday.
Hanukkah is celebrated for 8 days and 8 nights and commemorates the the victory over the Maccabees and the ensuing miracles during the rededication of the Temple in Jerusalem.
Hanukkah is also spelled Chanukah or Hannukah.
For more information about this holiday from a Judiasm site HERE'S THE LINK