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Happy Pi Day!
Posted by Michael on 14 March 2005, 03:00 GMT

Happy Pi Day! That's right, the most sacred nerd holiday has returned: March 14th, affectionally known as Pi Day to millions of people around the world. Last year we didn't have enough material for a dedicated Pi Day article, but I've managed to collect a few things this time. First, some of you (sadly) may not have yet voraciously scoured the internet for all things pi, and perhaps have not yet seen the awesome Pi-Search Page. You can find the position of your telephone number, social security number, or other fun numeric sequence inside the first 100 million digits of pi.

On the more creative fronts, a few years ago I created a song based upon pi, titled "Lost in Pi Land." Each note (A-G#) corresponds to a particular digit 0-9. Those of you with perfect pitch can transcribe the notes and find out how many decimal places of pi are in the piece. I might just be extremely biased when I say this, but this would make excellent background music for all of your Pi Day parties.

Lastly, we will be having informal Coordinated Pi Shouts in #tcpa on EFNet at 1:59:26 PM in each time zone. If you are not sure of how to get on IRC, please read our IRC page. Remember folks, that's coordinated pi shouting every hour on the :59:26. Once again, have a happy Pi Day and we'll shout "Pi!" together on IRC every hour.

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Re: Happy Pi Day!
Paul Houser Account Info
(Web Page)

My timezone is GMT-6. I still have to wait 48 minutes before Pi day.

Reply to this comment    14 March 2005, 05:13 GMT

Re: Happy Pi Day!
Paul Houser Account Info
(Web Page)

For the song, you should add the digits of "e" as the harmony.

Reply to this comment    14 March 2005, 05:17 GMT


Re: Re: Happy Pi Day!
redsoxfan Account Info

That is a really good idea, I might do it.

Reply to this comment    14 March 2005, 14:52 GMT

Re: Happy Pi Day!
miscellaneousprogrammer Account Info

Happy 3.14159 26535 89793 23846 26433 83279 50288 41971 69399 37510 58209 74944 59230 78164 06286 20899 86280 34825 34211 70679 day everybody!!! (Or should I say 11.00100 10000 11111 10110 10101 00010 00100 00101 10100 01 or 3.243F6 A8885 A308D 31319 8A2E0 37073 44A40 93822 299F day?) I am rather offended that we are supposed to cheer at every hour 59:26! We should only cheer at 3/14 1:59:26:535. Oh well...

Reply to this comment    14 March 2005, 15:29 GMT


Re: Re: Happy Pi Day!
Andy Janata  Account Info
(Web Page)

You cheer every hour until every time zone has past through Pi Time...

Reply to this comment    14 March 2005, 16:16 GMT


Re: Re: Re: Happy Pi Day!
tdavis07 Account Info

so there is always a time zone at 3/14 1:59:26.

BTW, Aren't there other times to celebrate being there are time zones that are are a half hour off of the standard. Just a thought.

Reply to this comment    14 March 2005, 19:18 GMT


Re: Re: Re: Re: Happy Pi Day!
Jake Griffin  Account Info
(Web Page)

Yes, there's at least one city in China that is that way....

Reply to this comment    15 March 2005, 17:34 GMT


Re: Re: Re: Re: Re: Happy Pi Day!
Jerk  Account Info

There is also a time zone like that in Indiana

Reply to this comment    15 March 2005, 23:53 GMT


Re: Re: Re: Re: Re: Re: Happy Pi Day!
Jake Griffin  Account Info
(Web Page)

No, Indiana (or part of it) just doesn't do daylight savings time...same where I live (Arizona). Half the year we're an hour ahead of CA, the other half we're right with them...it's not like, 5:00 there 5:30 here ever though...that's what I think he was talking about...in China there's timezones that, at one time the time will be 5:00, 5:30, and 6:00 all at the same time, so by celebrating pi day every hour, we'd miss a time zone...

Reply to this comment    16 March 2005, 06:22 GMT


Re: Re: Re: Re: Re: Re: Re: Happy Pi Day!
CajunLuke  Account Info
(Web Page)

India, Newfoundland, and several other areas are a half-hour off.

Reply to this comment    16 March 2005, 13:42 GMT


Re: Re: Re: Re: Re: Re: Re: Re: Happy Pi Day!
Rob van Wijk  Account Info

There's even this one: GMT+05:45 Kathmandu
For the Windows users, if you double click your systray clock and look in the timezone tab, there's a list of all timezones.

Reply to this comment    17 March 2005, 19:44 GMT


Re: Re: Re: Re: Re: Re: Re: Re: Re: Happy Pi Day!
Jake Griffin  Account Info
(Web Page)

There's also a link in the article...but I know all you guys just post about an article that you never read... ;)

Reply to this comment    18 March 2005, 08:49 GMT


Re: Re: Re: Re: Re: Re: Re: Re: Re: Re: Happy Pi Day!
Rob van Wijk  Account Info

I did read the article, I just think that the page mentioned in the article isn't the easiest way to search for 'weird' time zones. I had to look three times before finding 'Chatham Island', with an offset of 45 minutes. And that's probably just because it's very near the bottom, and I knew what to look for. If I hadn't know such a time zone existed in the first place, or it was in the middle of that very long list, I probably wouldn't have found it.

Reply to this comment    19 March 2005, 02:58 GMT

Re: Happy Pi Day!
mindstorm23 Account Info

In honor of Pi Day, the Pi-Search page upgraded to 200 million searchable digits of pi, not just 100 million.

Reply to this comment    14 March 2005, 16:46 GMT

Re: Happy Pi Day!
gnownoskcid  Account Info

my phone # =
floor(PI*10^3004322) - floor(PI*10^3004315)*10^7

Reply to this comment    14 March 2005, 18:55 GMT


Re: Re: Happy Pi Day!
Coolv  Account Info
(Web Page)

Expect a call form me! =>

Reply to this comment    14 March 2005, 19:54 GMT

Re: Happy Pi Day!
JcN  Account Info
(Web Page)

I have a book called "The Joy of Pi." It has the history of pi, all the formulas to compute pi, and some cool jokes. Here's a good one:

Definitions of pi:
Math teacher: pi is the ratio between a circle's circumference and its diameter
Physicist: pi is 3.141592653589 plus or minus 0.0000000000005
Engineer: pi is about 3

me: pi=-i*ln(-1)

Reply to this comment    14 March 2005, 19:23 GMT

Re: Re: Happy Pi Day!
Coolv  Account Info
(Web Page)

The last thing is QUITE interesting...

Who would've though that pi is relater to i?

Reply to this comment    14 March 2005, 19:55 GMT


Re: Re: Re: Happy Pi Day!
JcN  Account Info
(Web Page)

Euler discovered that. The actual formula in the book is e^(i*pi) + 1 = 0.

Reply to this comment    14 March 2005, 21:48 GMT

Re: Re: Re: Re: Happy Pi Day!
nicklaszlo Account Info
(Web Page)

The most beautiful theorem ever.

I like to write it as

-e^(i*pi)=1

That way, there's a negitive one and a one.

Or in LaTeX, which makes it look better:

$$-e^{i\pi}=1$$

Reply to this comment    15 March 2005, 00:02 GMT

Re: Re: Re: Re: Happy Pi Day!
Ben Cherry  Account Info
(Web Page)

that is the best way to write it, because you have 5 of the 6 most important numbers in a single equation, the sixth of course being phi, the golden ratio.

Reply to this comment    16 March 2005, 06:41 GMT


Re: Re: Re: Re: Happy Pi Day!
Rob van Wijk  Account Info

That's indeed the best way to write it. In that formula you have:
- The five most important constants (in no particular order 0, 1, pi, e and i)
- The three most important operators (+, * and ^)
- The most important comparator (is that a word?) (namely =)
And, above all, it's actually true. :D

Reply to this comment    17 March 2005, 19:49 GMT


Re: Re: Re: Re: Re: Happy Pi Day!
Jake Griffin  Account Info
(Web Page)

Yeah, that last part is kinda necessary...without it, I could just say:
1+0*pi^e=i^(-1*4) which also includes another concept (negative numbers) and uses parentheses to denote order of operations...but it isn't...wait...scratch that...it IS true!!! ;)

Reply to this comment    18 March 2005, 09:01 GMT


Re: Re: Re: Re: Re: Re: Happy Pi Day!
Rob van Wijk  Account Info

Yeah, but somehow I find it less elegant. Anyway, that's just my taste. (Nice job finding that formula though!)

Reply to this comment    19 March 2005, 03:00 GMT


Re: Re: Re: Re: Re: Re: Re: Happy Pi Day!
Jake Griffin  Account Info
(Web Page)

All I did was multiply by zero to get rid of all that e stuff, and I know that i^(4x) where x is any integer = 1...not too difficult

Reply to this comment    19 March 2005, 19:23 GMT


Re: Re: Happy Pi Day!
Sam Kumar  Account Info
(Web Page)

I have that book!

Reply to this comment    14 March 2005, 20:42 GMT

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