Leprechaun Day
Leprechaun Day is held on May 13. This event in the second decade of the month May is annual. 
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The leprechaun, a tiny elf from Irish folklore, is said to love gold coins, shamrocks, rainbows and anything green. According to legend, if a human succeeds in catching one of these little green men, the leprechaun will grant you three wishes, or even give you his pot of gold. Stories say that leprechauns are shoemakers, spending most of their lives fixing and making shoes.
Leprechaun means “small body.” Leprechauns are fairies – magical creatures. There aren't any female leprechauns. There's a leprechaun colony in Portland, Oregon. The modest garden, called Mill Ends Park, became an official city park on St. Patrick’s Day in 1976. Over the years, contributors have added miniature additions like a swimming pool complete with a diving board.
Leprechauns don't actually wear green – one of the biggest myths. Sometimes, leprechauns are red. It is believed that leprechauns are fond of playing tricks on those they meet.
Similar holidays and events, festivals and interesting facts
Limerick Day on May 12 (celebrates the birthday of Writer Edward Lear: 1812-1888. Limericks were popularized by Lear in 1846 in his Book of Nonsense);
Odometer Day on May 12 (The odometer was invented by William Clayton in 1847);
Cat Parade or Kattenstoet in Belgium on May 12 (Held on the second Sunday in May);
Frog Jumping Day on May 13
Top Gun Day on May 13
Chicken Dance Day on May 14 (“Der Ententanz” was the name of the song that inspired all of this, and while the dance has come to be called “The Chicken Dance”, the song itself is called The Duck Dance);
Nylon Stockings Day on May 15
Straw Hat Day on May 15