It's National Middle Child Day on August 13th.
More on Middle Child Day and the other days on the 13th below.
We detected 3,841 references to national Middle Child day on 13th the August. There were also a total of 103 other national days mentioned including: Left Handers, Left Handed, Middle and Filet Mignon Day.
The day shown for 'National Middle Child Day' is shown as we detected that day mentioned the most out of all the references to national days there were on August the 13th across social media. 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. This crowdsourcing of data method to assess the National Day date is used as opposed to being connected with any Government sacntioned lists :D Hurrah for democracy by concensus!