Festival of Lights, begins this year on Christmas Day, which has only happened four times since 1900. For some rabbis, the intersection of the two religious holidays provides an auspicious occasion for interfaith engagement.

When does Hanukkah start this year? And what's the correct way to light a menorah? Here are answers to some of the key questions people usually ask about Hanukkah.

Hanukkah, the Festival of Lights, is a Jewish holiday celebrating the defeat of the Syrian Greeks who oppressed the religious freedom of Judaism.

While the Jewish holiday of Hanukkah often falls at varying points during November and December, this year's festival of lights begins a bit later - and it comes with a calendar rarity.

But did you know that it's also Hanukkah? This year, Hanukkah begins with Christmas on the night of Wednesday, Dec. 25. Because the start of Hanukkah is tied to the Hebrew calendar, the dates change from year to year and the holiday can happen between late November and late December.