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Pi Day
- surprisetalk 3y agoWoohoo! We're halfway to Tau Day [1] https://tauday.com https://tauday.com
- lifthrasiir 3y agoHalfway to the Tau Day (179th or 180th day of year) is March 29th or 30th depending on your definition of "halfway". Pi day is only 73rd or 74th day of year.
- mikewarot 3y agoand only 6 more days until #HoosierPiDay, 3/20 ;-)
- ninju 3y agoFor those that need more context "On Feb. 6, 1897, Indiana's state representatives voted to declare 3.2 the legal value of pi" https://www.forbes.com/sites/kionasmith/2018/02/05/indianas-state-legislature-once-tried-to-legislate-the-value-of-pi https://www.forbes.com/sites/kionasmith/2018/02/05/indianas-...
- karmakaze 3y agoYes I feel so embarrassed if we're beeping out Pi and the message is received and decoded with the aliens thinking "They're still sending <what they call Tau> / 2". Imagine if we received a transmission of e/2. And what is our fascination with base-10 representation of Tau/2 digits anyway?
- ipsum2 3y agoGoogle has a cute pi day Easter egg on the search calculator.
- Dalewyn 3y agoI see your Pi Day and raise you White Day[1]. [1]: https://en.wikipedia.org/wiki/White_Day https://en.wikipedia.org/wiki/White_Day
- borlox 3y agoa) 3/14 = 0.21428571428 b) If I take reasonable date formats, it's date 2024-03-14 = 2007 today But kudos for only taking the first three digits, 3.14, as approximation for pi, which is in nearly all cases enough. Some friends in automotive engineering even tried using pi = 3 and 2*pi = 7 for a while, and the results were good enough.
- lifthrasiir 3y agoYou also have 22nd July the pi approximation day, which is also mentioned in Wikipedia and much more accurate.
- saalweachter 3y agoAnd November 10th (November 9th, this year), as the 314th day of the year. You can find quite a few excuses to eat pie.
- CharleFKane 3y agoI generally do not need an excuse to eat pie. Your mileage may vary.
- mavhc 3y agoMuch more? Or slightly more. If the number of digits in x/y and number in a decimal version are the same, the accuracy is approximately equal
- lifthrasiir 3y agoYou are correct. In hindsight I was quite tired back then and probably thinking of 355/113 or an average between 3.14 and 22/7 (~= 3.14143) instead...
- mavhc 3y ago6 digits vs 6 digits, works again
- hyperdimension 3y agoAs one of my math teachers would remind me, don't forget about 22 June, Pi Approximation Day!
- throwaway_5753 3y agoJuly 22 I think
- saalweachter 3y agoYou 1-based indexing people.
- madcaptenor 3y ago0-based indexing would celebrate in August.
- saalweachter 3y agoWho said anything about 0-based indexing?
- vel0city 3y agoI start counting everything at two, 'cause I'm always number one!
- hyperdimension 3y agoAw, bummer. You're right of course.
- voidUpdate 3y agoEver year, Matt Parker calculates pi, and this year it was the largest manual effort to calculate pi in a very long time[1] . I took part this year, though I didn't end up in the video sadly. It was lots of fun though, and a nice trip to london [1] https://youtu.be/LIg-6glbLkU https://youtu.be/LIg-6glbLkU
- fdgjgbdfhgb 3y agoI was there too! It was such a nice vibe :^D
- rrrpdx503 3y agoI put together an iPhone app that guides you through all the steps needed to compute Pi to 100 decimal places. Surprisingly enough, this doesn't require any complex math -- just basic addition, subtraction, multiplication and long division. The hardest part is verifying your intermediate results, and the app will do that for you. In testing it, I've been able to compute about 40 digits by hand. The way I look at it, some people climb mountains, and others run marathons... I figured it'd be an interesting challenge to see if I could calculate Pi by hand. https://apps.apple.com/us/app/pi-100-challenge/id6475694538 https://apps.apple.com/us/app/pi-100-challenge/id6475694538
- d--b 3y agoIt's in today's NYT connections puzzle: https://www.nytimes.com/games/connections https://www.nytimes.com/games/connections
- 4ggr0 3y agoI love the NYT Connections game, but some days it makes me feel like an absolute idiot because I can't get a single group correct and am puzzled when the solutions are revealed :D Together with globle, travle, worldle, framed and gamedle these couple of games are what I play during my morning coffe break, and I'm glad that they exist. If I feel like more I also try to solve boxofficegame and tradle, but I can't solve them often.
- dkdbejwi383 3y agoA lot of them need knowledge of USA culture and American English phrases. That's usually what I fail on.
- brk 3y agoAdd Dadagrams to your list: https://dadagrams.com/ https://dadagrams.com/ No affiliation, it was posted to HN a while back and that is how I found it. The premise is fun, you're playing against the developers dad.
- 4ggr0 3y agoThanks for the tip! Just played it and was absolutely destroyed by a random dad. I'm really not good at these word-based games, my strength is Globle and Travle. But Dadagrams is fun, added it to my bookmarks ;)
- AnimalMuppet 3y agoFor purists, there's Pi Second: 3/14 1:59:23. Not precise enough? You can go to Pi Millisecond, Pi Nanosecond, as far as you want to go. You don't get to enjoy them for long though...
- jtylr 3y ago1:59:27, no? Or even 1:59:26.5 if we want to get more precise!
- AnimalMuppet 3y agoArgh. Yes.
- jessekv 3y agoMy clock is only able to match four decimals... 15:00 :(
- pimlottc 3y agoI like Pi first, you don’t have to worry about getting too full for pi that way.
- ykonstant 3y agoThe wikipedia page on approximations of π contains a lot of fascinating results and historical tidbits: https://en.wikipedia.org/wiki/Approximations_of_%CF%80 https://en.wikipedia.org/wiki/Approximations_of_%CF%80
- hans_castorp 3y agoToday is 14.03. where I live....
- jtylr 3y agoUnfortunately there isn't a 31st April.
- remram 3y agoWho uses a dot to separate day and month? 14/03/2024 and 2024-03-14 are already 1 format too many...
- jonathankoren 3y agoPeople that use / to separate hours and minutes.
- hans_castorp 3y agoI wrote that comment on 14.03.2024 at 14:55:00
- jonathankoren 3y agoI think you mean 0/55/2
- Reubensson 3y agoA lot of people use. I think it is common at least in Europe but probably varies by country.
- remram 3y agoI found the list on Wikipedia: https://en.wikipedia.org/wiki/List_of_date_formats_by_country https://en.wikipedia.org/wiki/List_of_date_formats_by_countr.... So some of Eastern Europe and Scandinavia.
- 3y ago
- tomgp 3y agoAs a Brit I celebrate it on the 3rd day of the 14th month
- mavhc 3y agoNot the 31st of April?
- tomgp 3y agoI mean now you mention it that might make more sense, but we're a simple people bound by our traditions.
- alsetmusic 3y agoThis genuinely made me happy. May the Fourth be with you! Wait…
- NeoTar 3y agoI celebrate Pi-approximation day on the 22nd of July
- zeroonetwothree 3y agoEvery day is pi-approximation day. It’s just a question of how good the approximation.
- colimbarna 3y ago3.14 is about 0.00159 less than pi, whereas 22/7 is about 0.00126 greater than pi, making pi approximation day closer to pi than pi day.
- noman-land 3y agoThis is the research I come here for.
- deleted 3y ago
- RetroTechie 3y agoIt's also the birthday of Albert Einstein (1879).
- rand0mx1 3y agoAlso Karl Marx died on 14th of March.
- andygcook 3y agoPlugging the Pi Day Challenge, an online puzzle math quest all about pi created by my high school math teacher, Mr. Plummer (aka Plum). He’s been updating it with new puzzles for the past 15 years with the only goal of getting students excited about math. It requires a login to save your progress which I know a lot of people dislike here… but it’s worth checking out: https://www.pidaychallenge.com/ https://www.pidaychallenge.com/
- taintedq 3y agoIs it just me or is puzzle 24 still locked?
- SeanLuke 3y agoPerhaps we might proclaim all of March to be Biblical Pi Month in solemn remembrance of the declaration made in 1 Kings 7:23 and 2 Chronicles 4:2 that PI = 3. Also consider a semicircle of diameter D. Here the outside of the semicircle S, is D * PI / 2, so PI = 2 * S / D. Now instead of a single semicircle, consider two semicircles, each of diameter D/2, stacked on top of each other so their diameters line up to add to D. Each has a outside S/2, so once again PI = 2 * S / D. Now do it for 4 semicircles each of diameter D/4. Again, PI = 2 * S / D. Now continue to infinity. Eventually the outsides of the stacked semicircles will, at the limit merge to the diameter. Thus at the limit PI = 2 * S / D = 2 * D/D. Thus PI = 2. Maybe Pi Month should be February? I will leave that to the religious and mathematically inclined to argue.
- yreg 3y agoEach pi day I get excited for a new Vihart video. https://www.youtube.com/watch?v=2a9YgCCQYVI https://www.youtube.com/watch?v=2a9YgCCQYVI
- jonnycat 3y agoIt's a special kind of person who cares enough about math to celebrate "pi day", but not enough to be disturbed by the approximation of 3.14.
- jedberg 3y agoEven NASA only uses 15 digits because anything beyond that is unnecessary even at Universal scales. Also if you want to be really picky, you can celebrate at 1:59 and 29 seconds.
- pinkorchid 3y ago27 seconds! :)
- madcaptenor 3y agoI'd thought 26, but I wasn't rounding properly. I've heard it as "thirty-four seconds before two o'clock", to obscure what time it actually refers to.
- jonathankoren 3y ago“Pi Day” is a fake holiday invented by Big Math to sell more math.
- jedberg 3y agoIt was invented by Dominoes to sell more pizza.
- eranation 3y agoPi Is (still) Wrong. https://www.youtube.com/watch?v=jG7vhMMXagQ https://www.youtube.com/watch?v=jG7vhMMXagQ
- skrbjc 3y agoCongrats to all of those who received their MIT acceptances
- drewda 3y agoWould have been more entertaining if the "Oppenheimer" movie had been made about Frank Oppenheimer [1] -- a younger brother of J. Robert and the founder of the Exploratorium museum in San Francisco [2], where Pi Day comes from [3] [1] https://en.wikipedia.org/wiki/Frank_Oppenheimer https://en.wikipedia.org/wiki/Frank_Oppenheimer [2] https://en.wikipedia.org/wiki/Exploratorium https://en.wikipedia.org/wiki/Exploratorium [3] https://en.wikipedia.org/wiki/Pi_Day https://en.wikipedia.org/wiki/Pi_Day
- fnord77 3y agomy mom turns 90 today!
- tempodox 3y agoIt should rather be on the 116th day of the year, because 365/π ≈ 116, so around 28th of March (27th in a leap year).
- jayrot 3y agoAs a reminder, Pi Day is a doomsday! https://en.wikipedia.org/wiki/Doomsday_rule https://en.wikipedia.org/wiki/Doomsday_rule
- BeFlatXIII 3y agoCan't wait for e day on February 71st.
- snickerbockers 3y agoBut July 22 isn't for another four months.
- snickerbockers 3y agoBut July 22 is more than four months from now.
- robotguy 3y agoA bit late but a note for next year: Entemann’s snack pies are square…