| Holiday name | Holiday location | Holiday type |
|---|---|---|
| March Equinox | Multiple [Show] | Season |
| International Day of Happiness | - | International (Health & Body, Relationships & Family, United Nations) |
| Nowruz Bayram (Spring Festival) | Turkmenistan | Public Holiday |
| Nowruz/Spring Holiday | Azerbaijan | Public Holiday |
| World Storytelling Day | - | Unofficial (Food & Drinks) |
| Independence Day | Tunisia | Public Holiday |
| International Francophonie Day | Congo Democratic Republic | Observance (Culture & History) |
| National Ravioli Day | - | Unofficial (Food & Drinks) |
| National Native HIV/AIDS Awareness Day | - | Unofficial (Awareness & Cause, Health & Body) |
| National Proposal Day | - | Unofficial (Relationships & Family) |
| St. Patrick's Day | Canada (Newfoundland And Labrador) | Local Holiday |
| Day off for Benito Juárez's Birthday Memorial | Mexico | National Holiday |
| St. Joseph's Day | Colombia | National Holiday |
| Otago Anniversary Day | New Zealand (Otago) | Local Holiday |
Historical Events on March 20
- 1602: The Dutch East India Company is founded on this day.
- 1616: After thirteen years of imprisonment, Sir Walter Raleigh is released from the Tower of London.
- 1760: Almost 350 buildings are destroyed during the Great Boston Fire.
- 1815: Napoleon enters the city of Paris with over 340,000 troops – a regular army of 140,000 and 200,00 volunteers. This begins his 100 Days of Rule.
- 1852: Uncle Tom’s Cabin by Harriet Beecher Stowe is published on this day.
- 1854: In Ripon, Wisconsin, the Republican Party of the U.S is established.
- 1861: Mendoza, Argentina is completely destroyed by an earthquake.
- 1915: The Theory of Relativity is published by Albert Einstein.
- 1933: For fatally shooting Anton Cermak as he was attempting to assassinate the President-Elect Franklin D. Roosevelt, Giuseppe Zangara is executed in an electric chair in Florida.
- 1933: Heinrich Himmler order the creation of the Dachau Concentration Camp.
- 1952: The U.S Senate ratifies a peace treaty with Japan.
- 1956: Tunisia gains its independence from France.
- 2003: The U.S., the U.K., Australia and Poland start military operations in Iraq.
- 2012: Terror attacks across 10 Iraq cities result in over 250 people injured and over 50 people being killed.
- 2014: 9 people are killed by 4 suspected Taliban members when they attack the Kabul Serena Hotel.
- 2015: A Super Moon, the equinox and a solar eclipse all happen on the same day.
Famous Birthdays on March 20
- French Emperor Napoleon II is born in 1811.
- American painter and politician, George Caleb Bingham is born in 1811.
- American psychologist and author, B.F. Skinner is born in 1904.
- Mexican lawyer and Nobel Prize laureate, Alfonso Garcia Robles is born in 1911.
- American TV game show host, Jack Barry is born in 1918.
- American actor, screenwriter, director and producer, Carl Reiner is born in 1922.
- American TV host Fred Rogers is born in 1928.
- American actor Hal Linden is born in 1931.
- American baseball player George Altman is born in 1933.
