What is Christmas: Definition and 140 Discussions

Christmas is an annual festival commemorating the birth of Jesus Christ, observed primarily on December 25 as a religious and cultural celebration by billions of people around the world. A feast central to the Christian liturgical year, it is preceded by the season of Advent or the Nativity Fast and initiates the season of Christmastide, which historically in the West lasts twelve days and culminates on Twelfth Night. Christmas Day is a public holiday in many of the world's nations, is celebrated religiously by a majority of Christians, as well as culturally by many non-Christians, and forms an integral part of the holiday season organized around it.
The traditional Christmas narrative, the Nativity of Jesus, delineated in the New Testament says that Jesus was born in Bethlehem, in accordance with messianic prophecies. When Joseph and Mary arrived in the city, the inn had no room and so they were offered a stable where the Christ Child was soon born, with angels proclaiming this news to shepherds who then spread the word. Although the month and date of Jesus' birth are unknown, the church in the early fourth century fixed the date as December 25. This corresponds to the date of the winter solstice on the Roman calendar. Most Christians celebrate on December 25 in the Gregorian calendar, which has been adopted almost universally in the civil calendars used in countries throughout the world. However, part of the Eastern Christian Churches celebrate Christmas on December 25 of the older Julian calendar, which currently corresponds to January 7 in the Gregorian calendar. For Christians, believing that God came into the world in the form of man to atone for the sins of humanity, rather than knowing Jesus' exact birth date, is considered to be the primary purpose in celebrating Christmas.The celebratory customs associated in various countries with Christmas have a mix of pre-Christian, Christian, and secular themes and origins. Popular modern customs of the holiday include gift giving; completing an Advent calendar or Advent wreath; Christmas music and caroling; viewing a Nativity play; an exchange of Christmas cards; church services; a special meal; and the display of various Christmas decorations, including Christmas trees, Christmas lights, nativity scenes, garlands, wreaths, mistletoe, and holly. In addition, several closely related and often interchangeable figures, known as Santa Claus, Father Christmas, Saint Nicholas, and Christkind, are associated with bringing gifts to children during the Christmas season and have their own body of traditions and lore. Because gift-giving and many other aspects of the Christmas festival involve heightened economic activity, the holiday has become a significant event and a key sales period for retailers and businesses. The economic impact of Christmas has grown steadily over the past few centuries in many regions of the world.

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  1. C

    Christmas Optimization Problem

    Hello there! I was decorating my Christmas tree recently, and for some strange reason, I thought: "Hrm, I wonder if I could come up with an optimization problem where I have a definite length of lights/garland, and want to have equal space between each strand of lights/garland as they go around...
  2. Dembadon

    A Christmas tree made of books

    A holiday tree made of books! Here's a picture of a Holiday tree made of books on the second floor of the library at my university. I believe a few members of the student union built it, and they must've done it after closing hours (midnight) because I was there until 11:30PM and it wasn't up...
  3. K

    What does your Christmas Tree look like?

    As the title states.
  4. A

    Mechanics Ornament (Christmas)

    Hello, PF. I was hoping I'd be able to get your help with something. I have an incredible teacher this year in my Physics class, and I'd like to cheesily say thanks to her. She's vehement about the subject, and the only teacher I've ever had that's so. She's probably the only teacher that's...
  5. DaveC426913

    Is a Mustache Umbrella the Ultimate Christmas Wish?

    A mustache umbrella. The longing; how it must ache.
  6. E

    What's your favorit Christmas movie?

    - Christmas with The Cranks - Home Alone 1&2 (just classic!) - Just Friends (not Christmas movie but there's snow, Christmas) - A Christmas Carol (never saw the whole thing)
  7. J

    Christmas Light/Switchbox Wiring

    I have a school project and part of the requirement is to build a circuit that uses light and simple parallel and series wiring to show weight progression. The weight progression being shown is weight being added to a balsa wood tower. What I'm planning on doing is building a box with 8 bars cut...
  8. E

    [optics] Those weird blue Christmas lights

    Why can't our eyes focus on that one type of deep blue Christmas lights? It always appears fuzzy from a distance, even if another bulb right next to it appears in focus.
  9. H

    Does anyone still have their Christmas tree up?

    When do you plan on taking it down?:biggrin:
  10. jtbell

    I'm Dreaming of a White Christmas

    It looks like the "Pineapple Express" that has been clobbering California with a torrent of rain will bring snow to the eastern USA in time for Christmas. One of the TV stations in Greenville SC is predicting snow for the western North Carolina mountains, and probably also for upstate South...
  11. Evo

    All I want for Christmas is

    A new tv, and a new set of measuring cups and spoons with all of the odd sizes. What do you want?
  12. T

    The Physics of Christmas Decorations

    Greetings all, I am using a wire cable to suspend some Christmas decorations across my driveway. Total span is about 30 ft. One end attaches to the exterior brick wall of my house. the other end goes through a pulley that is suspended from a huge oak tree and then down to a...
  13. F

    Prep & Landing: A Hilarious Christmas Tradition!

    Did anyone get a chance to see Prep and Landing? It was hilarious. What a great show we're going to watch every Christmas from now on. Thank goodness for DVRs though. Wayyyyyyyy too many commercials.
  14. Pattonias

    Music Can You Write a Festive Song Without Mentioning Christmas?

    Can you write a Christmas song without using the word "Christmas"? If it is possible, can you give an example? If it isn't, how many times do you have to say "Christmas" in the same song before it is considered a Christmas song? Is it less than twenty? Bah-Humbug!
  15. M

    Are These Virtual Warm Fuzzy Slippers the Perfect Christmas Gift?

    Lisa, my virtual Christmas gift for you. I hope you don't have arachnophobia.
  16. Borek

    Christmas Gift Ideas: Share & Get Ideas!

    Share what you plan to buy, what you think could be a good idea, or what you want. In fact I am looking for ideas as I don't have a gift for Marzena yet :uhh:
  17. R

    Which Brands of Santoku Knives are Recommended for Christmas Gifts Under $200?

    I need to procure a set of knives for my wife for Christmas. We do a lot of cooking together and have both agreed we both favor the Santoku style for general purpose prep work. I have been all over Amazon but until you actually hold a knive and put it to use, one can never tell. So, can...
  18. Ivan Seeking

    Astronomy or Cosmology Christmas gift ideas

    I have a friend asking for ideas for an A or C oriented gift, including things that might be a bit of a scam, like having a star named after you. I know that you can buy land on the moon but that is expensive. Any ideas?
  19. OmCheeto

    What Happened to the Christmas Dove? A Tale of Survival and Compassion

    Well, the weather warmed up so I was out in the back yard this morning scrubbing my Saab Chia. It made the whole yard look bad when everything else was all pretty and white. While I was washing the hood, a small brown and white pigeon looking bird landed about 10 feet away from me. Then it...
  20. matthyaouw

    VOTE PF PHOTO CONTEST - It's (almost) christmas

    1.Andre 2.ZapperZ 3.Edward http://img122.imageshack.us/img122/1705/1001058jpgtractorij0.jpg 4.Hypatia http://i82.photobucket.com/albums/j269/hypatia3811/tree2.jpg 5.Borek 6.Marzena 7.Glondor 8.Turbo-1 Contest thread
  21. Cyrus

    Kathleen Battle's Christmas Celebration: Quality Holiday Tunes

    They are playing some really nice christmas songs on the classical station: https://www.youtube.com/watch?v=Z_-uUjsx3ao It's good quality christmas songs too, none of that celine dion crap. :yuck: I can't find it on youtube, but its Kathleen Battle - A christmas celebration
  22. C

    What is the meaning behind this mysterious shirt?

    My brother in law received this shirt from the girls in his office. 1772+14 (a drawing of him) 111 141(a backwards 5) I've attached a photo of the shirt. We can't figure it out. Any help would be greatly appreciated. I think he wants to impress the girls in the office...
  23. matthyaouw

    PF PHOTO CONTEST - It's (almost) Christmas (Dec 20th-27th)

    It's (almost) Christmas! Since it's that time of year and I am feeling horrrendously uninspired, the theme is Christmas. Enjoy! Contest Rules: 1. Any digital photo or digitally-scanned photo relevant to the theme will be accepted within the contest period. In case there's a gray area, or...
  24. B

    Fruit Fly Observation: A Christmas Gift from AP Bio

    I got a vial of fruit flies from my AP Biology teacher for Christmas, lol. Gotta observe them for two weeks and then we're going to study genetics by breeding them.
  25. russ_watters

    Astronomy Textbook for a Christmas Present

    My dad wants an astronomy textbook for Christmas. He's always been at least somewhat interested in the subject and he also wants to be conversant with me on the subject. My high school astronomy class was a mixture of history, light math/theory, and general factoids about -- stuff. I don't...
  26. Evo

    The Chimney Song: A Christmas Classic

    I love this song. I was just listening to it again on the radio. The Chimney Song Lyrics The Chimney Song There's something stuck up in the chimney And I don't know what it is, But it's been there all night long. Well, I waited up for Santa all Christmas night But he...
  27. M

    Drag Race Christmas Tree Design

    1. Homework Statement Question Details: A "Christmas Tree lighting system is used to start a drag race. The inputs to the system include a start button, a reset button, and two start line sensors. The outputs include lines for Red, Yellow, and Green lights and two Fault lights. When the...
  28. M

    Drag Race Christmas Tree Design

    Homework Statement Question Details: A "Christmas Tree lighting system is used to start a drag race. The inputs to the system include a start button, a reset button, and two start line sensors. The outputs include lines for Red, Yellow, and Green lights and two Fault lights. When the operator...
  29. N

    Why is My Potted Christmas Tree Drying Out and Losing Needles?

    I have a potted tree that I bought last year, it was to be my Christmas tree for many years to come. Unfortunately it seems to be drying and the needles are falling off. Is this because it is root bound? Not getting enough water (I doubt this one)? Too much water? Not enough fertilizer...
  30. K

    Calculating Magnification of Christmas Tree Ornament

    Homework Statement A spherical Christmas tree ornament is 4.76 cm in diameter. What is the magnification of the image of an object placed 11.9 cm away from the ornament? Homework Equations f = .5* r (1/di) + (1/do) = 1/f m=-(di/do) The Attempt at a Solution f = .5*2.38 =...
  31. F

    How Can I Build a Christmas Light Controller That Syncs with Music?

    I was just thinking with christmas right around the corner I wanted to do something a little different than the usual lights on the eves. I would like to build a light controller that cues different sections of my lights to music, kind of like this but Ill probably tone it back a little bit...
  32. M

    Christmas is here or I'm just getting old

    So today it happened. I bought my first christmas calendar for this year. I went to the ATM and little scouts had it surrounded. It was like clockwork and done almost with military precision. Even my army training didn't help me see it coming. When I had withdrawn an abundant quantity of cash...
  33. K

    Christmas, Easter, TF, etc.: lies to your children?

    I was thinking about this tonight. I'm in my mid 20's, working on my PhD. When I'm done and get married/have a kid or three I was trying to reason out what I would do about Santa, Easter Bunny, Tooth Fairy, etc. for my kids. On the one hand, I would hate to lie to my children, in any way shape...
  34. ZapperZ

    VOTE Photo Contest - It's Beginning To Look A Lot Like Christmas

    Hope everyone had a wonderful Christmas. This time, we have a smaller number of entry, but not lacking in quality. Please vote for the picture that best represents our theme of looking a lot like Christmas. 1. physarrista 2. hypatia 3. binzing...
  35. N

    Christmas Presents: See What Everyone Got!

    So, who got what for christmas?
  36. A

    What Are the Best Holiday Dishes to Enjoy with Friends and Family?

    Enjoy! http://www.norsk-akevitt.org/avApr/images/Arne-Brimis-ribbe.jpg
  37. wolram

    How can I spice up my Christmas leftovers with just one slice of bread?

    1 slice buttered bread, i slice turkey with cranberry jelly, 1 lettuce leaf trimmed to fit, 1 slice beef with mustard, 4 or 5 chipo what's it sausages, bacon off the top of the turkey, layer up and fit another buttered round of bread on top, squash down, eat.
  38. ZapperZ

    PF PHOTO CONTEST - It's Beginning To Look A Lot Like Christmas (12/22-12/28)

    It's Beginning To Look A Lot Like Christmas This week, you have the freedom to interpret the theme anyway you want. So anything Christmas related qualifies. I would like to take this opportunity to wish everyone Happy Holidays, Merry Christmas, Happy Hanukkah, Happy Kwanza, etc. Zz...
  39. wolram

    Itchy Rash Woes: Near Christmas Diagnosis

    Over night i have developed an itchy rash on my feet, legs and hands, even my eye balls feel itchy, i am in fear of my first medical illness, bollocks why so near christmas.
  40. F

    Can Electric Eels Power Our Christmas Trees?

    check it out: http://www.russiatoday.ru/features/news/18499/video http://www.russiatoday.ru/news/news/18499
  41. B

    Anybody not in the mood for christmas?

    I think this holiday is over-the-top and hyped up by the media way too much. To me , christmas is just another excused to waste money on useless items that you will probably replaced the next time christmas comes around! To me christmas is no more different than Valentine's day : There all just...
  42. G

    I buy Christmas presents when

    anyone can give me a convincing argument that I should buy them something that they don't need. So far for the past 6 years I haven't had to buy anything! It's great, you should try the same thing.
  43. F

    Art of Electronics for christmas?

    hey guys, I want a book on electronics for christmas as ill be studying electrical engineering next year (ETH Zurich), so through amazon i found Art of Electronics, which has some great reviews. Anyways I am wondering if any of you guys has any experience with this book and can tell me how...
  44. Evo

    Christmas Thread: Santa, Reindeer, Elves & Yule Goats

    You can post anything to do with Christmas/Hannukah/Yule Goats, etc... here. No religious preaching, we're talking Santa and reindeer, elves, goats, socks and chocolate coins, ok? To start off, since my favorite video was deleted from youtube thanks to a company that misses the point of free...
  45. Evo

    Merry Christmas Ivan: The Perfect Accordion Gift

    Merry Christmas Ivan! We play Guitar Hero at work during our monthly goof off lunch meeting. Our champion "hero" just e-mailed me about this. I thought this would be the perfect gift for Ivan, because "Nothing gets your toe to tapping more than an accordian"...
  46. W

    Graphmatica and equations for a christmas tree

    Hey does anyone know how to use graphmatica. I need to create equations to make a christmas tree.
  47. honestrosewater

    What is the mysterious Christmas frog in my shower?

    My Christmas Frog is back!11 I will explain later. I have to catch (and release) it now. But I want some ideas about how it keeps getting into my shower. This is the third time! I'm starting to suspect that this is someone's pet or robot. Perhaps I should check it for a camera this time. I...
  48. R

    Merry Christmas from you-know-who

    You'll never believe who's writing his own blog now... http://www.ahmadinejad.ir/ :eek:
  49. L

    Is Your Christmas Full of Bright LEDS and Fast Transistors?

    Merry Christmas! may your LEDs shine a little brighter, may your transitors switch a little faster and may you have 1/0 happiness on this special day:smile: :smile: :smile: ! MERRY CHRISTMAS TO ALL! John
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