It's National Super Hero Day on April 28th.
More on Super Hero Day and the other days on the 28th below.
We detected 3,472 references to national Super Hero day on 28th the April. There were also a total of 109 other national days mentioned including: Super Hero, Blueberry Pie, Guard Called In After One and Donut Day.
The day shown for 'National Super Hero Day' is shown as we detected that day mentioned the most out of all the references to national days there were on April the 28th 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!