Leif Erikson Day
Leif Erikson Day is held on October 9. United States, Canada, Iceland and Norway. This event in the first decade of the month October is annual. 
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Leif Erikson Day is celebrated on October 9th each year in honor of Leif Erikson who is believed to be the first explorer to set foot in North America. Leif Erikson was a Norse explorer, born just before 1000 A.D. (in approximately 960), and the second son of Erik the Red.
The voyage of Leif Erikson and his valiant crew — bold explorers from Scandinavia, believed to have been the first Europeans to reach the shores of North America — has been a source of inspiration to Nordic Americans for generations.
On Leif Erikson Day, "hinga-dinga-durgen" is said and a Viking helmet and large red beard are worn. The phrase “hinga dinga durgen” is used to imitate the general sound of the Scandinavian languages. It was first used in the Spongebob Squarepants episode “Leif Erikson Day.”
Leif Erikson Day doesn't get as much recognition because it's overshadowed by Monday's Columbus Day—which, unlike Erikson's day, is a federal holiday, meaning government employees get off work, as do many students and private-sector workers.
Similar holidays and events, festivals and interesting facts
National Fluffernutter Day in USA on October 8
American Touch Tag Day on October 8
National Pierogi Day in USA on October 8
Citigroup Day on October 8
Face Your Fears Day on October 8 (they might be afraid of you);
Fire Prevention Day on October 9 (Canada, United States);
National Nanotechnology Day on October 9 (United States);
National Moldy-Cheese Day and National Pizza and Beer Day in USA on October 9
Emergency Nurses Day on October 9 (the second Wednesday in October);
National Pet Obesity Awareness Day in USA on October 9 (Held on the second Wednesday of October);
National Tic Tac Day and National Angel Food Cake Day or Cake Decorating Day in USA on October 10
Hug a Drummer Day on October 10 (is celebrated all around the world in order to pay tribute to and show appreciation for the drummers in bands)