It's National Ugly Christmas Sweater Day on December 15th.
More on Ugly Christmas Sweater Day and the other days on the 15th below.
We detected 1,561 references to national Ugly Christmas Sweater day on 15th the December. There were also a total of 49 other national days mentioned including: Ugly Christmas Sweater, Ugly Sweater, Cupcake and Christmas Jumper Day.
The day shown for 'National Ugly Christmas Sweater Day' is shown as we detected that day mentioned the most out of all the references to national days there were on December 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!