It's National Ugly Christmas Sweater Day on December 16th.
More on Ugly Christmas Sweater Day and the other days on the 16th below.
We detected 2,007 references to national Ugly Christmas Sweater day on 16th the December. There were also a total of 46 other national days mentioned including: Sally, Christmas Jumper, Ugly Sweater and Chocolate Covered Anything 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 16th 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!