When Is National Dewey Decimal System Day?

The internet history of Dewey Decimal System Day

10th of December is National Dewey Decimal System Day

  First detected on the 10th of December 2015

  48 tweets


Is It Dewey Decimal System Day Today?

It's Dewey Decimal System day on the 10th of December.

The most recent detection of references to Dewey Decimal System Day was 1 year, 5 months ago.

There were many celebrations relating to national holdiays written about on social media that our algorithms picked up on the 10th of December. In total we detected 33 total unique days being shared such as Lager Day which had 359 people talking about it, or Human Rights Day having 177 tweets.


How Is The Date For Dewey Decimal System Day Calculated?

The day shown for 'National Dewey Decimal System Day' is based off how much chitter-chatter and buzz there was on Dec. 10, 2020 across social media making references to 'Dewey Decimal System 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: Minorities, Tequila or Signing Day. This crowdsourcing of data method to assess the National Dewey Decimal System 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 Dewey Decimal System Day

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

Can I Register Dewey Decimal System Day?

We don't have an international authority or governmental remit to declare any officially celebrated "national Dewey Decimal System day". We only aim to programatically reflect what 'National Day' it is based of what The Internet Says It Is. We believe this is much more fun as it reflects the nature of how the most amusing / interesting national days are often created organically and grow based off popular social trends and sharing, as such we don't add new days to our database unless they are organically observed on social media.



Is it National Dewey Decimal System Day Everywhere?

Yes? No.. Sort of | Maybe ¯\_(ツ)_/¯

What's really intersting is how whilst some National Days like National Daughters Day are seemingly celebrated internationally irrespective of geography, some very popular days (That often become the No. 1 National Day on our homepage) are in fact locally very specific and are offical holidays celebrated on a Country's national calendar. Take National Rambutan Day for instance, Rambutan is a popular Souteast Asian fruit and not seen so much in the UK, Europe or the USA. Some regionally specific trends subsequently become immensely popular internationally and worldwide, partly fuelled by widely shared 'National Days', National Pabebe Wave Day being one such example.


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


Hang On, It Was National Dewey Decimal System Day Already This Year..!?

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

We have also detected mentions of Dewey Decimal System day on;



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National Dewey Decimal System Day

It's Dewey Decimal System Day
On December 10th


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National Dewey Decimal System Day, on the 10th of December

Other Days

National Dog Day
National Donut Day
National Puppy Day
National Girlfriend Day
National Best-Friend Day
National Single Day
National Daughter Day
National Boyfriend Day
National Pug Day
National Daughters Day
National Pet Day
National Pancake Day
National Hug Day
National Hot-Dog Day


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For people who wish to promote National Dewey Decimal System Day, we've put together the following resources.
See also: How does Dewey Decimal System affect the share price of Apple, Facebook, Microsoft?
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