Hanukkah begins tonight at sundown and continues over the next eight days.
Hanukkah 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.
Each day at sundown one more candle is lit until the entire Hannukkah menorah glows with the light of the holiday. That's why you will not see the candles (or electric lights) on the menorah fully lit for seven of the eight days.