Chanukah (Hanukkah) starts on the Hebrew calendar date of 25 Kislev, and lasts for eight days. The secular dates for 2015 are December 6-14.
From Encyclopaedia Judaica:
"MENORAH ("candelabrum"), the name given to the seven-branched candelabrum which, according to the Bible, was a prominent feature of the *Tabernacle erected by the people of Israel in the wilderness, as well as in the Jerusalem Temple.