Fun quiz. I love odd holidays. What about May Day? In parts of the Heartland, May 1 is a big day for delivering May baskets. Another fun holiday is Hobbit day (Sept. 22, which is Bilbo and Frodo's birthday).
I don't think May Day is obscure enough. It's been celebrated for thousands of years and is a public holiday in many countries (including the U.K. and India).
It's also many different things to different people. A day celebrating Spring, started by ancient pagans who celebrated by staging orgies and fertility rituals and dancing around phalluses (the May pole); a worker's or Communist holiday (huge in China for this reason); an environmentalist holiday; and also my birthday.
Only 4% got Buy-Nothing-Day? Thought the hint made it rather obvious? -- I like those lesser holidays, 14 March, 4 May, 19 Sept.. and so on :) Towel day is great too! And there's a "eat orange junk food" day. Except that it's name is something I can't remember now..
Had never heard of Sweetest Day or Mole Day; like others have always heard Devil's Night called Mischief Night. Disappointed Guy Fawkes Day was overlooked.
I knew that the ironic lonely version of Valentine's Day was something to do with singles, but just typing in that didn't work. Next I tried "sad"... and that worked for Singles Awareness Day. Amazing. On another note, it should be Burns Night (far more common, since it's a supper thing). Also, please accept "Meat-free" and "Cycle to Work", which are what I've heard them called in Australia.
Paul McCartney thinks meat free Monday should be accepted: https://www.theguardian.com/environment/video/2014/sep/21/paul-mccartney-raps-meat-free-monday-video