Unlucky Day
Unlucky Day is held on December 31. You get the chance to get all the bad things out of the way, do next year will be happy, healthy and prosperous. This event in the third decade of the month December is annual. 
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Long considered a harbinger of bad luck, Friday the 13th has inspired a late 19th-century secret society, an early 20th-century novel, a horror film franchise and not one but two unwieldy terms—paraskavedekatriaphobia and friggatriskaidekaphobia—that describe fear of this supposedly unlucky day. Researchers estimate that as many as 10 percent of the U.S. population has a fear of the number 13, and each year the even more specific fear of Friday the 13th, known as paraskevidekatriaphobia, results in financial losses in excess of $800 million annually, as people avoid marrying, traveling or in the most severe cases, even working.
Unlucky Day is an annual event, observed every year on December 31. It is a day for you to turn your bad luck into luck by forgetting about your misfortunes.
On a more sombre note, 28 December is widely regarded as the unluckiest day of the year, so don't do anything and certainly don't start anything on this day! Better yet, give up your superstitions!
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Similar holidays and events, festivals and interesting facts
Tick Tock Day on December 29 (urges us to make the most of this time to complete those tasks that can be done in that time);
No Interruptions Day on December 31
Make Up Your Mind Day on December 31
Cinderella Day in Japan on December 31 (Shinderera De);
Commitment Day on January 1 (The first known Commitment Day was celebrated in 1960 as an extension of the tradition of New Year’s Resolutions—however);
First Foot Day on January 1
Polar Bear Swim Day or Polar Plunge Day on January 1 (Canada and United States);
Z Day on January 1 (People whose first or last name start with the letter Z must have it pretty rough. Most processes, systems and organizations use alphabetical sorting as standard, meaning they are always last no matter the place or occasion)