It's National Mourning Day on April 4th.
More on Mourning Day and the other days on the 4th below.
We detected 1,211 references to national Mourning day on 4th the April. There were also a total of 58 other national days mentioned including: Stockpile Website A, School Librarian, Hug A Newsperson and Rat Day.
The day shown for 'National Mourning Day' is shown as we detected that day mentioned the most out of all the references to national days there were on April the 4th 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!