Pi Day takes place on March 14th this year, as it has every year since 1988 when this mathematical holiday was invented. Pi Day? Does that sound crazy? Sure it does. It’s irrational. Pi is the world’s most famous “irrational” number. Therefore, Pi Day is the world’s most irrational holiday! Take a circle, any circle, and divide the circumference by the diameter. The quotient is the number called pi, represented by the Greek letter π. It is a little more than three. How much more? That is a question that people have been working on for centuries. Pi is an incredibly useful number in mathematics, physics and engineering. It helps us understand things from the shape of an apple to the energy of stars. It helps us design things, from buildings to spaceships. Pi is an irrational number. That means when you write it as a decimal, its digits do not just end (like 3.5) and they do not repeat in a pattern (like 0.3333…, where the 3s go on forever). Here is a slice of pi: 3.141592653… The “dot-dot-dot” means the digits keep on going. How far? Is there a pattern? With supercomputers, mathematicians have probed the mysteries of pi to over a trillion digits. The digits keep going. Infinitely. No pattern has ever been found. (Written in an ordinary font, a trillion digits of pi would go around the world 50 times.) But the endless, patternless nature of pi enchants many minds and some people delight in memorizing the digits. A 69 year-old man named Akira Haraguchi recited 100,000 digits from memory in Tokyo in 2006. He shattered the previous record of Chao Lu from China, who had memorized merely 67,890 digits of pi after studying for four years. Can you see a date in the first three digits: 3.14? It’s March 14th — Pi Day! This holiday is celebrated worldwide by students, teachers and math enthusiasts who enjoy pi-themed activities, clothing, jokes and food (namely pie). This is an ordinary year as far as Pi Day is concerned, but in 2015, Pi Day was really special. After 3.14, the next two digits of pi are 15. So March 14, 2015, was not just any old Pi Day. It was the “Pi Day of the Century.” You’ll have to wait until March 14, 2115, for another Pi Day so sweet! Happy Pi Day, everybody!
 This chart shows many ways that pi can be formed -- just so you'll always recognize it when you see it. Pi is a mathematical symbol as well as a letter in the Greek alphabet. Can you find it in the alphabet chart? Hint: it follows Omega. David Schwartz probes many mathematical mysteries in his books and school presentations given all over the world. He wrote this Nonfiction Minute while celebrating Pi Day at Tashkent International School in Uzbekistan. He is a member of iNK's Authors on Call and is available for classroom programs through Field Trip Zoom, a terrific technology that requires only a computer, wifi, and a webcam. Click here to find out more. MLA 8 Citation Schwartz, David M. "Happy Pi Day." Nonfiction Minute, iNK Think Tank, 14 Mar. 2018, www.nonfictionminute.org/the-nonfiction-minute/Happy-Pi-Day. 
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The onset of spring, summer, fall, and winter every year is precisely measured, depending on the sun’s position. But there’s no similar astronomical or scientific reason for celebrating New Years on January 1. Many people don’t. The Chinese New Year occurs on the second new moon after the winter solstice, between late January and mid-February. Muslims mark the occasion on the first day of Muharram, the first month of the Islamic calendar. That calendar is based on the lunar cycle, 11 or 12 days shorter than the solar calendar. So their New Year comes a little earlier every year. Rosh Hashanah, the start of the Jewish New Year, is a two-day observance that begins 163 days after Passover and varies between September 5 and October 5. Unlike other New Year’s celebrations, Rosh Hashanah is holy, a time for piety rather than parties. There was just as much variation in ancient times. In Babylon, the first new moon after the vernal equinox marked the New Year. Egyptians celebrated it in early August, when the annual Nile River flooding began. In Greece, Athens and Sparta couldn’t get along, so their respective new years didn’t occur at the same time. In Athens, it was the first new moon after the summer solstice, while the Spartans waited until early fall. So how did January 1 become the most widely accepted start of the New Year? The answer: Julius Caesar. For centuries, the Roman calendar was in a state of chaos, with the number of days in the year fluctuating widely. In 46 BCE, Caesar worked with the brightest Egyptian astronomers to retool the calendar. He wanted the year to begin on the first of January, a month named after the god Janus. Janus had two faces: one looking backward (at the year just ending) and the other facing forward. For the Romans, it was party time! Caesar didn’t stick around very long after his innovation. On the Ides of March—March 15, 44 BCE—he went to the Roman Senate as usual. While one senator distracted him, others swarmed around him with knives they’d hidden inside their togas, hacking and gashing. He collapsed and died. His calendar proved more durable. When Roman legions conquered new territories, the natives had to adopt the Roman calendar. Every day, especially at the start of the new year, it was a reminder of Roman power.
 The senators encircle Caesar. A 19th-century interpretation of the event by Carl Theodor von Piloty  Here's what a Roman calendar looked like. Some 200 fragments have been found so far. They are collectively known as Fasti. You've been hearing from Jim Whiting almost weekly, so we thought you might want to know more about him. He's an interesting fellow: Children's book author. Acclaimed multi-genre freelance editor. Entertaining and informative classroom visitor. Middle school running coach. Award-winning magazine publisher. Workshop presenter. Sportswriter. Light versifier. E-commerce and e-book writer. Teacher. Runner. World traveler. Sailor. Scuba diver. Photographer. Actor. Patron of the arts. Hometown Hero. And of course Voracious Reader. For more about Jim, read his biography and background. MLA 8 Citation Whiting, Jim. "Happy New Year--in August?" Nonfiction Minute, iNK Think Tank, 2 Jan. 2018, www.nonfictionminute.org/Happy-New-Year-in-August.  
When I was a kid fifty years ago, President Theodore Roosevelt had a bad rap. We learned that way back in the 1900s, he banned Christmas trees from the White House. What a lousy father, I thought. Down through the years, the story went something like this: Across America in the early 1900s, huge forests were in danger of destruction from a lumbering practice called “clear-cutting.” Lots of newspapers and public leaders asked Americans to stop going to the woods to cut Christmas trees. Now when the Roosevelts and their six kids lived in the White House, they didn’t have a tree. Stockings and presents, but not a tree. So folks assumed that Roosevelt had outlawed Christmas trees, because he was a huge outdoorsman and conservationist. But, according to people who’ve done their history homework, that’s not the whole truth. It’s possible that First Lady Edith Roosevelt had six kids to think of and didn’t want the extra fuss of a Christmas tree. Christmas trees had become very popular ever since the old German tradition was picked up in the United States, but not everyone chose to have one. As it turned out, the Roosevelts did have at least one tree, courtesy of their eight-year-old son Archie. On Christmas morning 1902, Archie surprised his family. The president wrote about it in a letter that told of Christmas morning:
A magazine ran the story of Archie’s tree the next year. From then on, it picked up all sorts of embellishments, sort of like playing telephone at a birthday party. Today, the best explanation of the old story appears on a blog run by the Forest History Society. Visit their website. And for more cool facts about Christmas trees, check out the website of the folks who know, the College of Agriculture at the University of Illinois.  Roosevelt Family in 1903 with Quentin on the left, TR, Ted, Archie, Alice, Kermit, Edith, and Ethel. Credit: Library of Congress  Young Archie Roosevelt on his horse Algonquin. Credit: Library of Congress  The discovery of the tree in the seamstress's closet was a popular Christmas illustration for a story that ran in Ladies Home Journal. The story underscored the simplicity of the Roosevelt family’s Christmas decorations and the president’s conservation ethic.  Theodore Roosevelt for Kids brings to life this fascinating man, an American giant whose flaws were there for all the world to see. Twenty-one hands-on activities offer a useful glimpse at Roosevelt’s work and times. Readers will create a Native American toy, explore the effects of erosion, go on a modern big game hunt with a camera, and make felted teddy bears. The text includes a time line, online resources, and reading list for further study. And through it all, readers will appreciate how one man lived a “Bully!” life and made the word his very own. Kerrie Hollihan is a member of iNK's Authors on Call and is available for classroom programs through FieldTripZoom, a terrific technology that requires only a computer, wifi, and a webcam. Click here to find out more. MLA 8 Citation Hollihan, Kerrie Logan. "Did Theodore Roosevelt Ban Christmas Trees?" Nonfiction Minute, iNK Think Tank, 22 Dec. 2017, www.nonfictionminute.org/the-nonfiction-minute/ Did-Theodore-Roosevelt-Ban-Christmas-Trees. Accessed 22 Dec. 2017.  
When the Seleucid emperor Antiochus IV came to power in 175 BCE after his brother was assassinated, he insisted on being called Antiochus Epiphanes (“Antiochus the Visible God”). To the Jews who had the misfortune to be among his subjects, he was Antiochus Epimanes (“Antiochus the lunatic”). No matter his name, he was definitely bad news to the Jews. Because of his Greek background, Antiochus believed in many gods. The Jews, on the other hand, were monotheistic. Antiochus soon began imposing his beliefs on the Jews and making it much more difficult for them to practice their religion. For example, anyone caught circumcising their newborn children would be put to death. In 168 he sacked Jerusalem. His forces cut down thousands of defenseless Jews of all ages, looted and desecrated the Second Temple, and erected a massive statue of the chief Greek god Zeus (using himself as a model for the sculptor who created the statue). Soon the altar ran red with the blood of swine that were slaughtered as sacrifices. For good measure, Antiochus also outlawed the Hebrew religion. The outraged Jews fought back. An elderly priest named Mattathias and some of his men killed a group of Seleucid soldiers. That ignited a revolt against Antiochus’s rule. When Mattathias died, his son Judah assumed the leadership role. Judah soon acquired the surname of Maccabee (“the hammer”) for his skill in battle. After a series of successful guerrilla operations, he led his vastly outnumbered forces to two decisive victories that resulted in the recapture of Jerusalem in 165. The first order of business was cleansing the temple so it could be rededicated. The ceremony began on the 25th day of the Hebrew month of Kislev. According to legend, the small amount of purified oil that was readily available for the rites was expected to burn just a single night. Instead it burned for eight nights, when a new supply became available. That miracle gave rise to the ceremony of lighting one candle for each of the eight nights of Hanukkah, which means “dedication.” Because the Hebrew calendar is lunar-based, the dates of Hanukkah change each year. This year Hanukkah begins [December 12] at sunset and lasts until sunset on December [20]. To the Jewish families who celebrate the holiday, Happy Hanukkah!  The holidays are approaching and millions of people will be listening to Handel’s Messiah. Read all about the composer in Jim Whiting’s Masters of Music biography. MLA 8 Citation Whiting, Jim. "The Story of Hanukkah." Nonfiction Minute, iNK Think Tank, 11 Dec. 2017, www.nonfictionminute.org/the-story-of-hanukkah.  
Long before we celebrated Halloween, Celtic people in the British Isles honored the dead during Samhain (which we pronounce “SOW-ren”). Some scholars think that Samhain was a Celtic version of New Year’s Eve. It was a holiday filled with ritual. Folks believed that in late fall, the veil between the worlds of the living and the dead was at its very thinnest. To light their way at this dark time of year, they carved out vegetables, and popped glowing coals inside. A popular choice was the humble turnip, which they grew, cooked, and ate, of course. Why turnips, you may ask? Think! Pumpkins didn’t grow in Europe—they are a New World vegetable. In fact, an old drawing shows how Indians in Virginia grew pumpkins in their villages in the late 1500s. Why not give turnip carving a try? Order big ones at your farm market. When you first bring them home, they might be hard as rocks. Let them sit out in the open for several days until they soften up a bit. To carve yourself some examples of the original “jack-o-lantern,” grab the turnips, some tea lights, a small knife, and a pointy spoon. Hold the turnip root tip up. Use a marker to draw the circle for the lid. Then trace or draw eyes, nose, mouth—whatever you’d like. Now be sure there’s an adult to help you! Use the knife to carve around the circle. Remove the top of the turnip and set it aside. That’s your lid. Use the spoon to scoop out the turnip just like a pumpkin. Be sure to leave a nice thick wall. Then pierce the turnip with your knife and gently carve out the features. Pop the tea light inside. Find a dark spot. Have the grownup help you light the wick and… LET IT GLOW! Today, folks grow pumpkins in the Old World, so kids all over Ireland, Scotland, England, and Wales carve jack-o-lanterns just like you do. Turnips are out….unless you want to feed the cows.
 Kerrie Hollihan's biography of Isaac Newton sheds light on a lot of ideas people thought were mysterious. If you liked the turnip activity, there are lots more in this book. Kerrie Hollihan is a member of iNK's Authors on Call and is available for classroom programs through FieldTripZoom, a terrific technology that requires only a computer, wifi, and a webcam. Click here to find out more.
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