When Is National Harmonica Day?


National Harmonica Day is on the 18th of April with 9 tweets.

More on Harmonica Day below.



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About Harmonica Day

Is It Harmonica Day Today?

It's Harmonica day on the 18th of April.

Harmonica Day' is by our calculation on: April the 18th. The first time we detected Harmonica Day was the 17th of April 2015 and the most recent detection of references to Harmonica Day was 2 years, 7 months ago.

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

There were many celebrations relating to national holdiays written about on social media that our algorithms picked up, on the 18th of April. In total we detected 104 total unique days being shared such as Sibling Day which had 703 people talking about it, or Lineman Appreciation Day having 577 tweets. A random sample of which are shown below.


National days on the 18th of April

National Harmonica Day, on the 18th of April

How Is The Date For Harmonica Day Calculated?

The day shown for 'National Harmonica Day' is based off how much chitter-chatter and buzz there was on April 18, 2016 across social media making references to 'Harmonica 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: Animal Crackers, Transgender Hiv Testing or Siblings Day. This crowdsourcing of data method to assess the National Harmonica 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 Harmonica Day

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

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National Harmonica Day

It's Harmonica Day
On April 18th

Can I Register Harmonica Day?

We don't have an international authority or governmental remit to declare any officially celebrated "national Harmonica 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 Harmonica 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.

teenagers sharing national days on social media

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

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

We have also detected mentions of Harmonica day on;



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