It's National Cheeseburger Day on September 15th.
More on Cheeseburger Day and the other days on the 15th below.
We detected 412 references to national Cheeseburger day on 15th the September. There were also a total of 99 other national days mentioned including: Cheeseburger, Double Cheeseburger, Online Learning and Thank You Day.
The day shown for 'National Cheeseburger Day' is shown as we detected that day mentioned the most out of all the references to national days there were on September the 15th 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!