Sun-Earth Day in United States
Sun-Earth Day in United States is held on March 20. This event in the second decade of the month March is annual. 
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Sun-Earth Day is a combination of programs and events throughout the year ending with a Sun-Earth Day celebration on or near the Spring Equinox in March.
NASA announced the first Sun-Earth Day in 2004, to celebrate the Transit of Venus – a rare celestial event in which Venus passes between Earth and the Sun, briefly casting its shadow over the latter. The event is different than a solar eclipse, which—caused by the moon passing between Earth and the Sun—blocks the Sun from our earthling view. Because Venus is much farther away than the moon, its shadow appears as a tiny dot moving across the solar disk.
Similar holidays and events, festivals and interesting facts
National Chocolate Caramel Day and Poultry Day in USA on March 19
Absolutely Incredible Kids Day on March 19 (Held on the third Thursday in March);
National Native HIV/AIDS Awareness Day on March 20
National Ravioli Day, Steak and Knobber Day in USA on March 20
Snowman Burning Day on March 20
Won't You Be My Neighbor Day on March 20
MeatOut Day in Colorado, US on March 20
Meat on the Menu Day in Nebraska, US on March 20
Match Day on March 20 (Held on the third Friday of March);
National Ag Day on March 21 (Ag Day is organized by the Agriculture Council of America [ACA]);
National French Bread Day and National Crunchy Taco Day in USA on March 21
Senior Skip Day or Beach Day in the USA and Canada on March 21 (The date for missing the lessons varies among different schools);
National Corndog Day or Corn Dog Day in US on March 21 (observed the third Saturday in March since 1992)
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