A federal, legal holiday is a day that has been declared a legal day off by Federal statute or Executive order. When a legal holiday falls on a Saturday, the Friday immediately preceding the holiday is considered a publi... More »

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Memorial Day, observed the last Monday in May, is a federal holiday in the United States. Declared by an act of Congress in 1971, the holiday honors all those who have died in American wars. More »

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Veteran's Day is considered a federal holiday in the United States and is celebrated on Nov. 11 each year. This date was first established in 1919 by President Wilson and most recently signed into effect by President For... More »

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President Ronald Regan signed the Martin Luther King Jr. Day holiday into law in 1983, and it was first observed as a national holiday in January, 1986. The holiday is observed annually on the third Monday in January. More »

In 1937, President Franklin Roosevelt established Columbus Day as a federal holiday. However, Columbus Day had already been unofficially celebrated in the United States since the 18th century. More »

The Fourth of July is a federal holiday that celebrates the day that America adopted the Declaration of Independence and declared its independence from Great Britain. This day is also known as Independence Day. More »

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Mole Day is an unofficial holiday that commemorates a chemical principle known as the Avogadro constant or Avogadro's number; this day falls on October 23 and is marked at 6:02 a.m. or 6:02 p.m. This is because Avogadro'... More »

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