Hanukkah (also spelt Chanukah) is an eight-day Jewish wintertime 'festival of lights' celebrated in the month of Kislev, which typically corresponds to late November-early December in the Gregorian calendar. Hanukkah commemorates a victory of the people of Israel over the Seleucids, and the miracle of a single day's worth of oil lasting for eight days until more could be prepared according to purity rules.