When Is National Tree Day?


National Tree Day is on the 21st of September with 4,593 tweets.

More on Tree Day below.



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About Tree Day

Is It Tree Day Today?

It's Tree day on the 21st of September.

Tree Day' is by our calculation on: September the 21st. The first time we detected Tree Day was the 6th of April 2015 and the most recent detection of references to Tree Day was 2 months, 2 weeks ago.

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

There were many celebrations relating to national holdiays written about on social media that our algorithms picked up, on the 21st of September. In total we detected 84 total unique days being shared such as Sponge Candy Day which had 632 people talking about it, or Peace Day having 532 tweets. A random sample of which are shown below.


National days on the 21st of September

National Tree Day, on the 21st of September

How Is The Date For Tree Day Calculated?

The day shown for 'National Tree Day' is based off how much chitter-chatter and buzz there was on Sept. 21, 2016 across social media making references to 'Tree 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: Tree, Kissing or Public Lands Day. This crowdsourcing of data method to assess the National Tree 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 Tree Day

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

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National Tree Day

It's Tree Day
On September 21st

Can I Register Tree Day?

We don't have an international authority or governmental remit to declare any officially celebrated "national Tree 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 Tree 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 Tree Day Already This Year..!?

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

We have also detected mentions of Tree day on;



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