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Pi Approximation Day

Since 2012, I celebrate Pi Approximation Day by approximating pi with streetchalk at the Noorderplantsoen Groningen.

  • What: Approximate pi with street chalk
  • When: 5:46 AM (yes, in the morning) at Pi Approximation Day (that is, Juli 22nd)
  • Where: Noorderplantsoen, Groningen, at the North side of the oval pond with sprinklers, close to restaurant Zondag (see map below)
  • To bring: a box of street chalk, knee protectors are recommended
  • Costs: a box of street chalk :-)

If it is raining, at 4:00 AM, the event will be cancelled, which will be displayed in the status indicator here:

2019: Yes

Gathering location

2018

We were with:

  • B. S-B.
  • J.?.
  • M.B.
  • P. S-B.
  • R. B.
  • R. G.

We approximated 500 digits of pi, breaking all earlier records!

www.sikkom.nl

Pi Approximation Day, photo by sikkom.nl

Pi Approximation Day, photo by sikkom.nl

Pi Approximation Day, photo by sikkom.nl

2017

Since 2012, I celebrate Pi Approximation Day by approximating pi with streetchalk at the Noorderplantsoen Groningen. In 2017 we were with six: B. S-B., C.IJ., J.K, M. S-B., P. S-B and me. We reached 247 digits behind the comma.

Our pi was filmed by the YouTube user Bhut_Trolokia, view the YouTube video here.

Out pi got mentioned in a news article by sikkom. The text in the article, however, is complete nonsense.

Here are the photos, thanks to C.IJ.

2016

Since 2012, I celebrate Pi Approximation Day by approximating pi with streetchalk at the Noorderplantsoen Groningen. This year I was helped by C.IJ. and we reached approximately 150 (nice) - 200 (sloppy) digits behind the comma.

2015

Since 2012, I celebrate Pi Approximation Day by approximating pi with streetchalk at the Noorderplantsoen Groningen. This year I was helped by C.IJ. and we reached exactly 314 digits behind the comma.

2014

Since 2012, I celebrate Pi Approximation Day by approximating pi with streetchalk at the Noorderplantsoen Groningen. This year I reached exactly 100 digits behind the comma.

2013

Since 2012, I celebrate Pi Approximation Day by approximating pi with streetchalk at the Noorderplantsoen Groningen. In 2013, a local newspaper found out:

Pi Approximation Day article Dagbad van het Noorden 2013-07-23

Thanks to the people that found out this article was written!

2012

2012 was the first your I celebrated Pi Approximation Day by approximating pi with streetchalk at the Noorderplantsoen Groningen.

FAQ

Why that time?

Due to this unorthodox hour, we can work relatively undisturbed. It is the KNMI time of sunrise, which means that there will be light to see.

How to listen to the digits of pi?

cat pi.txt | espeak -s 10 -g 10
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