When Is National Pi Day?

The internet history of Pi Day

14th of March is National Pi Day

  First detected on the 8th of March 2015

  15,142 tweets

pi kingfisher pied pied kingfisher

Is It Pi Day Today?

It's Pi day on the 14th of March.

The most recent detection of references to Pi Day was 1 year, 7 months ago.

There were many celebrations relating to national holdiays written about on social media that our algorithms picked up on the 14th of March. In total we detected 86 total unique days being shared such as Napping Day which had 12,040 people talking about it, or Nap Day having 6,239 tweets.

How Is The Date For Pi Day Calculated?

The day shown for 'National Pi Day' is based off how much chitter-chatter and buzz there was on March 14, 2017 across social media making references to 'Pi Day'. Our algorithms examine all of the references to National Days across social media and updates whatnationaldayisit.com hourly, with our homepage displaying the current national day, including others such as: Pi, Breakfast or Potato Chip Day. This crowdsourcing of data method to assess the National Pi Day date is used as opposed to being connected with any Government sacntioned lists :D Hurrah for democracy by concensus!

I'd Like To Promote National Pi Day

We've put together the following resources full of nifty tips on how to increase the reach of Pi Day. The resources include: graphs, badges, and resources on what steps to take to boost Pi Day's visibility.

Can I Register Pi Day?


Is it National Pi Day Everywhere?



We're now tracking the sentiment around every mention of Pi day to show how people feel about Pi. See if people like Pi here.
We're detecting how Pi affects other things more widely than just being a celebrated day. See how Pi affects company share prices.

Hang On, It Was National Pi Day Already This Year..!?

Yes, this is strangely enough entirely possible. The date shown for National Pi Day can change, if for instance several hundred people tweeted about Pi Day in early April, then in May a few thousand people tweeted about Pi day, then the date shown for National Pi Day, could come up twice :D

We have also detected mentions of Pi day on;

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National Pi Day

It's Pi Day
On March 14th

WhatNationalDayIsIt's Daily Day Widget



National Pi Day, on the 14th of March

Other Days

National Donut Day
National Doughnut Day
National Pi Day
National Chocolate-Chip-Cookie Day
National Chocolate-Chip Day
National Hotdog Day
National Teacher Day
National Lollipop Day
National Teachers Day
National Wildlife Day
National Internet-Best-Friend Day
National Bootie Day

For any media or sponsorship queries, please contact info@whatnationaldayisit.com
For people who wish to promote National Pi Day, we've put together the following resources.
See also: How does Pi affect the share price of Apple, Facebook, Microsoft?
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