"Hanukkah (sometimes transliterated Chanukkah) is a Jewish holiday celebrated for eight days and nights. It starts on the 25th of the Jewish month of Kislev, which coincides with late November-late December on the secular calendar.
In Hebrew, the word "hanukkah" means "dedication." The name reminds us that this holiday commemorates the re-dedication of the holy Temple in Jerusalem following the Jewish victory over the Syrian-Greeks in 165 B.C.E." Go here Judaism.com to read the whole article.