This year, some are celebrating "Thanksgivukkah," as Thanksgiving is celebrated the day after the first Hanukkah calendars are lit on Wednesday night. The convergence of these two holidays won't happen again for another 77,798 years, according to some calculations.
An eight-day celebration, Hanukkah commemorates the rededication of the Second Temple in Jerusalem in the second century B.C.E. during the Maccabean revolt against oppressive Greek rulers. It is one of the most widely observed Jewish holidays and is celebrated by lighting a nine-branch candelabrum, commonly called a menorah. (Technically, the candelabrum for Hanukkah is called a hanukkiah to distinguish itself from the seven-branch menorah used in the Temple and described in Exodus 25.)
The story of Hanukkah is one of revolution and miracles: Greek influence over the Jews in the Land of Israel had become an affront to Jewish culture and ritual. Antiochus, the Greek ruler, forbade Jewish religious practice, so a small group of Jews, the Maccabees, revolted. These Jews eventually prevailed and, as a first order of business, restored the Holy Temple, which had been desecrated. The menorah in the Temple needed to be re-lit because, according to tradition, it should burn continuously. The Temple liberators found one vial of olive oil, enough for one day of light. Miraculously, the oil lasted for eight days.
Today, Jews everywhere light menorahs on each night of Hanukkah. Traditionally, one candle or flame is lit for each night until the eighth night, when all eight lights shine together. The menorah has a ninth "helper" flame -- known as the shamash -- used to light the other candles. This is necessary because in Jewish law the Hanukkah lights' only purpose is to visually proclaim the miracle of the holiday. Jews place the lit menorah in a prominent window in order to fulfill this commandment.
Gift giving is now a common practice on Hanukkah, and it is therefore a beloved time for Jewish children. Fried potato pancakes (latkes) and doughnuts (sufganiyot) are traditional fare, and a spinning top (dreidel) with four Hebrew letters has become synonymous with the holiday. The letters -- nun, gimel, hei, shin -- form an acronym for the message of Hanukkah: A great miracle happened there.
Click through for a collection of Hanukkah how-tos: