12 Things You Might Not Know About Passover

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For practicing Jews, Passover is a time to remember their deliverance from captivity in ancient Egypt. It's one of the most important holidays on the Jewish calendar, and in the days before the first night's seder, families make preparations such as cleaning the home of chametz and planning for a week of meaningful dietary restrictions. Here are 12 facts about Passover that you wouldn't have learned from a yearly viewing of The Ten Commandments.

1. FIRSTBORN SONS NEED TO FAST.

matzo
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The festival of Passover (or Pesach) commemorates the story of the Jews' escape from Egypt. The passover in question is when the houses of the observant Israelites in captivity were "passed over" as Egypt's first-born children were killed (although confusingly, in the Torah, the date the 14th of Nisan is referred to as Passover while the week-long celebration is the Festival of Matzot. They've since been combined into one celebration called Passover).

In celebration of the firstborns being saved, it is traditional for them to fast on 14 Nisan. If there are no children, the oldest member of the household fasts. If the firstborn is a daughter? That depends on the tradition of the community.

2. IT LASTS EITHER SEVEN OR EIGHT DAYS.

reading the Haggadah at Passover
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The Torah says to celebrate Passover for seven days (the time between the Exodus and the parting of the Red Sea), but many Jews outside of Israel celebrate for eight. Traditionally each month of the Jewish calendar was determined by an astronomical observation and could be either 29 or 30 days long. After a new month was determined, messengers spread the word. For Jews who lived too far away for messengers to bring timely news of a new month, it was safest to celebrate for an extra day, so no matter how long the previous month was, the holiday was celebrated.

Eventually the calendar was standardized and the eight-day custom was no longer needed. Today, some Jewish denominations outside of Israel (like Reform Judaism) celebrate the mandated seven days, while many others prefer eight days. Inside Israel it's generally seven.

3. LEAVENED GRAINS ARE A NO-GO …

Person sweeping the floor
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One of the most important parts of Passover preparations is cleaning the house of chametz, or leavened food. Even the tiniest bit has to go. Because the Jews left Egypt in such a hurry, it's said they didn't have time to leaven their bread. To commemorate that, five grains (traditionally wheat, barley, rye, spelt, and oats) are banished from the house. Jews can spend weeks ensuring that the house is perfectly clean—and there are even professional chametz cleaning services that say they'll boil toys, break down and reassemble kitchen chairs … and possibly still leave the house dirty. There's a saying in Jewish households: "Dust is not chametz." The goal is to get rid of chametz above all else.

4. … UNLESS THEY CAN BE COOKED WHILE WALKING BETWEEN MIGDAL NUNAIYA AND TIBERIAS.

baking matzo
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While there are restrictions against leavened products, one of the most important parts of a Passover meal is matzo, which is made from wheat. The difference between matzo and regular bread is that the wheat in matzo cannot come into contact with any water until it's ready to be cooked. And once water and wheat are mixed it has to be baked within 18 minutes (sources differ as to whether the timer stops when it enters or leaves the oven). After 18 minutes, fermentation begins and it is chametz.

But why 18 minutes? Supposedly it's because that's how long it takes to walk between the cities of Migdal Nunaiya and Tiberias in Israel. Over the years, scholars have argued about how long it would actually take to walk between the cities, with some proposing that copying errors reduced the distance from circa 4 miles to 1 and thus reduced the time from 72 minutes to 18. Nowadays, it's felt that even if there was a transcribing error, there's enough tradition to use 18 minutes. [PDF]

5. ESSENTIALLY, GRAINS ARE COMPLICATED.

matzo ball soup
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As Jews spread around the world, they often found themselves faced with foods that weren't explicitly mentioned for Passover. Sephardic Jews (generally) feel that only the five expressly mentioned grains are forbidden, while Ashkenazi Jews worry that the dishes made from certain other plants that look similar and are grown in similar conditions as the forbidden grains will risk contamination between the two. So if these ingredients (called kitniyot, or "legumes") were avoided, actual chametz could more easily be avoided (although kitniyot is nowhere near as regulated as chametz).

But recently, some authorities have argued that improved technology and storing methods have rendered the old methods obsolete. It's a current debate in some communities.

6. SOME OF THE BEST MATZO FLOUR IS MADE IN ARIZONA.

field of wheat
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One of the most difficult parts of making matzo is keeping the flour dry before it's ready to be converted into matzo; any water risks converting flour into chametz. So, according to The New York Times, one sect of Hasidic Jews has found the perfect farming conditions to produce their wheat—the arid fields of southwestern Arizona. The group of ultra-Orthodox Jews from Brooklyn, New York, work with a farm in Yuma, Arizona, to ensure that no unwanted moisture affects the crop, and the resulting kosher wheat is shipped back east to make up to 100,000 pounds of matzo.

7. PETS ALSO GET SPECIAL FOOD.

cute dog with head tilted
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For Passover, houses must be free of chametz and there can be no benefit derived from it. This includes pet food. In keeping with this, there are Passover-friendly pet foods out there, and some Rabbinical authorities propose switching out your pet's diet for a few days—such as giving dogs straight meat or herbivores a variety of approved vegetables. If a pet must have a specific type of food—or you can't get Passover-friendly pet food—some observant Jews follow the rabbinical authorities who give the option to sell the pet to a gentile for a few days and then get it back after Passover has ended.

8. THERE ARE SIX SYMBOLIC FOODS.

seder plate for Passover
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The focal point of the start of Passover is the Seder plate, and on it are six ceremonial items:

Beitzah—A cooked egg, representing sacrifice (it's also been suggested that while most foods soften when you cook them, eggs get harder, representing the resolve of the Jewish people)

Haroset—a sweet mix of fruits, nuts, and honey/wine that symbolizes the mortar used by Jews during their slavery

Karpas—a green vegetable signifying new life

Maror and hazeret—bitter herbs (often horseradish for maror and something like romaine for hazeret) to represent the bitterness of slavery

Zeroa—a shank bone (or a chicken neck) to remember the Paschal sacrifice.

9. SOMETIMES AN ORANGE IS ADDED.

slice of orange
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In the 1980s, Dartmouth professor Susannah Heschel spoke on a panel at Oberlin College. While there, she met some students who told a story of a rabbi who said "There's as much room for a lesbian in Judaism as there is for a crust of bread on the seder plate." In response, they started placing a crust on their plates.

Heschel was inspired, but felt that using bread sent the wrong message, writing "it renders everything chametz … [suggesting] that being a lesbian is being transgressive, violating Judaism." So she proposed putting an orange (originally a tangerine) on the Seder plate to symbolize Jewish gays and lesbians. At some point a story emerged that it was actually to symbolize women in general, but Heschel explained: "A woman's words are attributed to a man, and the affirmation of lesbians and gay men is erased. Isn't that precisely what's happened over the centuries to women's ideas?"

Other more modern additions include pine cones (symbolizing mass incarceration), an artichoke (to recognize interfaith families), or tomatoes or Fair Trade chocolate (to remember that there's still slavery around the world).

10. SOME MAJOR COMPANIES GET INVOLVED …

ad for kosher Coca-Cola
Mike Mozart, Flickr // CC-BY-2.0

Many companies produce special kosher-for-Passover products, from chocolate syrup to cake mixes. But one of the most important is Coca-Cola. In the early 20th century Rabbi Tobias Geffen was serving as an Orthodox Rabbi in Atlanta. Due to his location (Coca-Cola was invented and is headquartered in Atlanta), he was frequently asked if Coca-Cola was kosher. After analyzing the product, he found two problem ingredients—alcohol and glycerin.

The alcohol was a problem because it was grain-derived and thus unacceptable for Passover, a problem that was solved by switching to fermented molasses. The other problem, however, was glycerin. The glycerin was derived from animals, and there was simply no economic way to ensure the animals were kosher. As Roger Horowitz explains in Kosher USA, there's an exemption in the rules for a tiny amount of an unacceptable ingredient—designed to cover mistakes—and Coca-Cola's glycerin content was dramatically below that level. Rabbi Geffen, however, believed that since the glycerin was deliberately added, it didn't qualify for this rule. Soon though, a new source of glycerin from cottonseed oil emerged, and Coca-Cola was approved for Passover.

When Coca-Cola switched to high fructose corn syrup, however, that created a problem for Ashkenazi Jews. As such, today there's a special yellow-capped Coca-Cola that doesn't use HFCS and is certified kosher.

11. … ESPECIALLY MAXWELL HOUSE.

Maxwell House Haggadahs
Tom Lappin, Flickr // CC BY-NC 2.0

But the most influential company is likely Maxwell House. In the 1920s they decided to expand their presence to Jewish families—but there was a problem. Colloquially known as coffee "beans," there was a view that they were legumes, and as such forbidden to Ashkenazi Jews. Soon Maxwell House convinced reluctant coffee drinkers that their product was acceptable and in 1932 the company began publishing the Maxwell House Haggadah (the Haggadah is the telling of the Exodus and how to perform a seder meal). In the years since, Maxwell House estimates that it has published 50 million Haggadahs, which were even the preferred text for the Obama White House Seder.

12. THE WORLD’S LARGEST SEDER ISN'T WHERE YOU MIGHT EXPECT.

Hundreds of worshippers gather in a hall for Passover in Kathmandu in 2014.
Hundreds of worshippers gather in a hall for Passover in Kathmandu in 2014.
PRAKASH MATHEMA, AFP/Getty Images

Going on for almost 30 years and hosting over 1000 people, the Kathmandu Seder was started in 1989 by the Israeli ambassador to Nepal, who quickly realized that the demand was much higher than he was ready for. The ambassador contacted a rabbi friend who dispatched two rabbinical students to aid the preparations. The seder was a massive success—expecting 90 guests and hoping for 150, they ultimately had 500 guests.

Nowadays, preparations for the seder start months in advance, with 1000 bottles of wine and over 1000 pounds of matzo getting shipped in from the United States and Israel.

Autumn Equinox: The Science Behind the First Day of Fall

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On September 22, the Sun will shine directly over the equator—the midpoint of the Earth. (For 2018, this moment will happen at 9:54 p.m. ET.) The whole world will thus experience a day and night of equal length. In the Northern Hemisphere, we call this the autumn equinox. It marks the first day of fall. Around the world, people are marking the day with ceremonies, some of them ancient (and some less so).

You might be wondering two things: 1. Why on almost every other day of the year (the vernal equinox being the other exception) do different parts of the world have days and nights of differing length? 2. What do they call the day in the Southern Hemisphere?

A DAY AT THE BEACH

The answer to each of these questions resides in the Earth's axial tilt. The easiest way to imagine that tilt is to think about tanning on the beach. (Stay with me here.) If you lay on your stomach, your back gets blasted by the Sun. You don't wait 30 minutes then flop over and call it a day. Rather, as you tan, every once in a while, you shift positions a little. Maybe you lay a bit more on one side. Maybe you lift a shoulder, move a leg a little. Why? Because you want the Sun to shine directly on a different part of you. You want an even tan.

It might seem a little silly when you think about it. The Sun is a giant fusion reactor 93 million miles away. Solar radiation is hitting your entire back and arms and legs and so on whether or not you adjust your shoulder just so. But you adjust, and it really does improve your tan, and you know this instinctively.

People light candles during the autumn equinox celebration at Neris River waterfront in Vilnius, Lithuania after sunset on September 21, 2013.
People light candles during the autumn equinox celebration at Neris River waterfront in Vilnius, Lithuania after sunset on September 21, 2013.
PETRAS MALUKAS, AFP/Getty Images

The Earth works a lot like that, except it's operating by physics, not instinct. If there were no tilt, only one line of latitude would ever receive the most direct blast of sunlight: the equator. As the Earth revolved around the Sun, the planet would be bathed in sunlight, but it would only be the equator that would always get the most direct hit (and the darkest tan). But the Earth does have a tilt. Shove a pole through the planet with one end sticking out the North Pole and one end sticking out the South, and angle the whole thing by 23.5 degrees. That's the grade of Earth's tilt.

Now spin our little skewered Earth and place it in orbit around the Sun. At various points in the orbit, the Sun will shine directly on different latitudes. It will shine directly on the equator twice in a complete orbit—the fall and spring equinoxes—and at various points in the year, the most direct blast of sunlight will slide up or down. The highest latitude receiving direct sunlight is called the Tropic of Cancer. The lowest point is the Tropic of Capricorn. The poles, you will note, are snow white. They have, if you will, a terrible tan—and that's because they never receive solar radiation from a directly overhead Sun (even during the long polar summer, when the Sun never sinks below the horizon).

WHEN DO THE SEASONS CHANGE?

A Maya priestess conducts an autumn equinox ceremony at El Salvador's Cihuatan Archeological Park.
A Maya priestess conducts an autumn equinox ceremony at El Salvador's Cihuatan Archeological Park.
Jose CABEZAS, AFP/Getty Images

The seasons have nothing to do with the Earth's distance from the Sun. Axial tilt is the reason for the seasons. The Sun is directly over the Tropic of Cancer (66.5 degrees latitude in the Northern Hemisphere) on June 21 or 22. When that occurs, the Northern Hemisphere is in the summer solstice. The days grow long and hot. As the year elapses, the days slowly get shorter and cooler as summer gives way to autumn. On September 21 or 22, the Sun's direct light has reached the equator. Days and night reach parity, and because the Sun is hitting the whole world head-on, every latitude experiences this simultaneously.

On December 21 or 22, the Sun is directly over the Tropic of Capricorn in the Southern Hemisphere, meaning the Northern Hemisphere is receiving the least sunlight it will get all year. The Northern Hemisphere is therefore in winter solstice. Our days are short and nights are long. Parity will again be reached on March 21 or 22, the vernal equinox for the Northern Hemisphere, and the whole process will repeat itself.

Members of The Druid Order of London conduct a ceremony on Primrose Hill to celebrate the Autumn Equinox on September 22, 2008 in London, England.
Members of The Druid Order of London conduct a ceremony on Primrose Hill to celebrate the Autumn Equinox on September 22, 2008 in London, England. The Druid Order of London, which was founded in Oxford in 1245, has been conducting the Autumn Equinox ceremony on Primrose Hill since 1717.
Matt Cardy, Getty Images

Now reverse all of this for the Southern Hemisphere. When we're at autumnal equinox, they're at vernal equinox. Happy first day of spring, Southern Hemisphere!

And welcome to fall, Northern Hemisphere! Enjoy this long day of sunlight, because dark days are ahead. You'll get less and less light until the winter solstice, and the days will grow colder. Take solace, though, in knowing that the whole world is experiencing the very same thing. Now it's the Southern Hemisphere's turn to get ready to spend some time at the beach.

This story first ran in 2016.

The 13 Scariest Haunted Houses in America

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Horror lovers will feel right at home in New York or Ohio. Attractions in those states claim four out of 13 spots on Halloween expert Larry Kirchner’s new list of America’s scariest haunted houses. Drawing upon his 25 years of experience designing and installing Halloween attractions, Kirchner releases the list on his website, Hauntworld.com, each year.

This year, Headless Horseman Hayrides and Haunted Houses in Ulster Park, New York, tops the list. A historic 18th-century manor provides a spooky backdrop to the haunt, which includes a theatrical hayride, corn maze, eight haunted attractions, and escape rooms. “Dr. Dark’s Circus Side Show” (with everyone’s favorite: creepy clowns) will be one of the new themes offered this year, and another new section called “Two Raven’s Manor” will feature stunt actors and a magician.

The runner-up on Kirchner’s list is Field of Screams in Mountville, Pennsylvania. The attraction promises its hayride will be “the most disturbing ride of your life through thick rows of corn.” Expect to see demented doctors, evil nurses, chainsaw and ax murderers, and miscellaneous monsters.

Check out the full list of attractions below, and head to Haunt World’s website for additional details.

1. Headless Horseman Hayrides and Haunted Houses: Ulster Park, New York
2. Field of Screams: Mountville, Pennsylvania
3. The Dent Schoolhouse: Cincinnati, Ohio
4. 13th Gate: Baton Rouge, Louisiana
5. Netherworld: Atlanta, Georgia
6. Nightmare on 13th: Salt Lake City, Utah
7. Haunted Schoolhouse & Laboratory: Akron, Ohio
8. Bennett’s Curse: Baltimore, Maryland
9. Haunted Overload: Lee, New Hampshire
10. Erebus: Pontiac, Michigan
11. Hell’s Gate: Lockport, Illinois
12. The Darkness: St. Louis, Missouri
13. Bayville Screampark: Bayville, New York

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