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How often do hanukkah and christmas overlap

Bundle up: Wednesday marks the winter solstice, the primary day of winter and the day with the fewest hours of daylight for the entire yr. And in just a few days, two holidays celebrating mild will happen through the darkest time of yr, when Hanukkah begins on Christmas Eve.

The final time that this actual Christmas-Hanukkah overlap occurred was in 1978, and subsequent time it would occur will likely be in 2027. The incidence now occurs roughly on common each 30 years, in accordance with Sacha Stern, a professor of Rabbinic Judaism at College School London who’s an professional on the Jewish calendar.

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Stern factors out that whereas they happen on the identical dates of their respective calendars’ months—the pageant of Hanukkah happens on the twenty fifth of the Jewish month of Kislev, whereas Christians have a good time Christmas on the twenty fifth of December—that’s coincidental. Each of those holidays have been instituted beneath Greco-Roman rule, however 200 years aside from each other. Within the Roman Empire, throughout roughly the primary 4 or 5 centuries of the Christian period, Roman sources additionally related December 25 with the date of the winter solstice, “which is why it’s usually claimed that Christmas was consciously grafted onto the feast of the Roman solar god,” says Philipp Nothaft, a fellow at All Souls School on the College of Oxford who’s an professional on calendars. “Widespread as this rationalization could also be, it receives little to no assist from the extant sources.”

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The rationale why Hanukkah overlaps with Christmas solely among the time has to do with the distinction between the Jewish calendar, which is lunar, and the Gregorian calendar utilized by most individuals within the West. Neither calendar matches up precisely with the period of time it takes the Earth to maneuver across the Solar, however the Gregorian calendar is shut sufficient that the distinction may be fastened with an occasional leap day. The 12-month lunar calendar, then again, is about 11 days shorter, so a day is just not sufficient to forestall the calendar from turning into unmoored from the seasons. As a substitute, the lunar yr requires a leap month. Calendar buffs might name this course of “intercalation” and the additional thirteenth month an “intercalary” month.

In 2016, that further month was inserted into the Hebrew calendar — it began in late February — and in consequence the vacation of Hanukkah seems afterward the Gregorian calendar than it might in any other case. However Nothaft explains that the rationale the vacation strikes is much more difficult than that: even with intercalation, the Jewish yr and the Gregorian yr aren’t precisely the identical common size. The distinction between the 2 cycles—about six minutes—signifies that the Gregorian date of Jewish holidays like Hanukkah will slowly migrate.

Hanukkah, which observers could also be used to seeing fall in November or December, will finally be related to December and January as a substitute. In different phrases, Nothaft says, the overlap between Christmas and Hanukkah will turn out to be extra widespread.

There’s even a rabbinic story that can be utilized to elucidate why festivals like Hanukkah and Christmas happen right now of yr. In it, Adam notices the times turning into shorter and shorter and will get fearful that mild will disappear all collectively. “However then, on the twenty fifth of the Hebrew month that Hanukkah comes out of, he realizes it’s simply due to the winter solstice,” says Elisheva Carlebach, a professor of Historical past at Columbia College. “He was so grateful when he noticed that the times would develop longer once more that, on that turning level, he celebrated. I believe [the story] is a approach of explaining why each Jews and Christians have a pageant of lights within the darkest season. It’s a type of indirect acknowledgement that there’s some widespread impulse for folks to face with darkness with mild.”

Write to Olivia B. Waxman at [email protected]

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