Hanukkah, Judaism’s eight-day 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.

“This can be a profound opportunity for learning and collaboration and togetherness,” said Rabbi Josh Stanton, a vice president of the Jewish Federations of North America. He oversees interfaith initiatives involving the 146 local and regional Jewish federations that his organization represents.

“The goal is not proselytizing; it’s learning deeply from each other,” he said. “It’s others seeing you as you see yourself.”

Traditions

While Hanukkah is intended as an upbeat, celebratory holiday, rabbis note that it’s taking place this year amid continuing conflicts involving Israeli forces in the Middle East, and apprehension over widespread incidents of antisemitism.

Rabbi Moshe Hauer, executive vice president of the Orthodox Union, acknowledged that many Jews may be feeling anxious heading into Hanukkah this year. But he voiced confidence that most would maintain the key tradition: the lighting of candles on menorah candelabras and displaying where they’re visible through household windows and in public spaces.

“The posture of our community — without stridency, just with determination — is that the menorah should be in our windows, in a place where the public sees it,” Hauer said.

“It is less for us, the Jewish community, than for the world,” he added. “We have to share that light. Putting the menorah in the window is our expression of working to be a light among the nations.”

Hauer concurred with Stanton that this year’s overlap of Hanukkah and Christmas is “an exceptional opportunity to see and experience the diversity of America and the diversity of its communities of faith.”

Milestone

Rabbi Motti Seligson, public relations director for the Hasidic movement Chabad-Lubavitch, noted that this year marks the 50th anniversary of a milestone in the public lightings of menorahs. It was on Dec. 8, 1974 — as part of an initiative launched by the Lubavitcher leader, Rabbi Menachem M. Schneerson — that a menorah was lit outside Philadelphia’s Independence Hall, where the Liberty Bell was housed at the time.

“Hanukkah is a celebration of religious liberty, so that it’s not taken for granted,” Seligson said. “One of the ways of doing that is by celebrating it publicly.”

He said Chabad was organizing about 15,000 public menorah lightings this year through its numerous branches around the world.

“There certainly is some apprehension,” Seligson said, referring to concerns about antisemitism and political friction. “Some people question whether Jews will be celebrating as openly as in the past.”

“What I’m hearing is there’s no way that we can’t,” he added. “The only way through these difficult times is by standing stronger and prouder and shining brighter than ever.”

The calendar

Why is Hanukkah so late this year? The simple answer is that the Jewish calendar is based on lunar cycles, and is not in sync with the Gregorian calendar which sets Christmas on Dec. 25. Hanukkah always begins on the 25th day of the Jewish month of Kislev, a date which occurs between late November and late December on the Gregorian calendar.

The last time Hanukkah began on Christmas Day was in 2005. But the term “Chrismukkah” — signifying the overlap of the two holidays — had become a popular term before then. The term gained extra currency in 2003, when the character Seth Cohen on the TV drama “The O.C.” embraced the fusion holiday as a tribute to his Jewish father and Protestant mother.

This season, the Hallmark Channel introduced a new Christmas movie called “Leah’s Perfect Gift,” depicting a young Jewish woman who had admired Christmas from a distance, and gets a chance to experience it up close when her boyfriend invites her to spend the holidays with his family. Spoiler alert: All does not go smoothly.

Despite such storylines suggesting a fascination with Christmas among some Jews, Stanton says research by the Jewish Federations reveals a surge in Jews seeking deeper connections to their own traditions and community, as well as a surge in Jews volunteering for charitable activities during the holidays.

“The opportunity is to share with others how we celebrate Hanukkah,” he said. “It’s a holiday of freedom, hope, showing proudly you are Jewish.”