When Is National Cosplay Day?

The internet history of Cosplay Day

21st of October is National Cosplay Day

  First detected on the 19th of June 2015

  281 tweets


Is It Cosplay Day Today?

It's Cosplay day on the 21st of October.

The most recent detection of references to Cosplay Day was 1 month, 1 week ago.

There were many celebrations relating to national holdiays written about on social media that our algorithms picked up on the 21st of October. In total we detected 103 total unique days being shared such as Pumpkin Cheesecake Day which had 1,856 people talking about it, or I Love You Day having 684 tweets.


How Is The Date For Cosplay Day Calculated?

The day shown for 'National Cosplay Day' is based off how much chitter-chatter and buzz there was on Oct. 21, 2015 across social media making references to 'Cosplay 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: Apple, Burn Awareness or Back To The Future Day. This crowdsourcing of data method to assess the National Cosplay 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 Cosplay Day

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

Can I Register Cosplay Day?

We don't have an international authority or governmental remit to declare any officially celebrated "national Cosplay 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 Cosplay 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 Cosplay day to show how people feel about Cosplay. See if people like Cosplay here.
We're detecting how Cosplay affects other things more widely than just being a celebrated day. See how Cosplay affects company share prices.


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

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

We have also detected mentions of Cosplay day on;



Get The Badge

National Cosplay Day

It's Cosplay Day
On October 21st


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National Cosplay Day, on the 21st of October

Other Days

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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 Cosplay Day, we've put together the following resources.
See also: How does Cosplay affect the share price of Apple, Facebook, Microsoft?
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