9/11
The Mayan calander ends on December 21, 2012, which happens to be the winter solstice. I have never heard that anything is going to happen on March 20 of that year. So I guess the answer is I don't know. Nothing happened in March 20 of 1912
The Great Depression happened when the stock market crashed on March 29, 1929.----
See the link below for more information about what events happened in what year on March 11th.
If it was September 20, 2002 the day after 9/11, then it was considered one of the best days in US history because everyone was able to connect and help on another no matter what the race, religion, age or gender
Ico - 2001 VG was released on: Canada: 24 September 2001 USA: 24 September 2001 Japan: 6 December 2001 South Korea: 22 February 2002 Austria: 20 March 2002 Belgium: 20 March 2002 Denmark: 20 March 2002 Finland: 20 March 2002 France: 20 March 2002 Germany: 20 March 2002 Italy: 20 March 2002 Luxembourg: 20 March 2002 Netherlands: 20 March 2002 Norway: 20 March 2002 Portugal: 20 March 2002 Spain: 20 March 2002 Sweden: 20 March 2002 UK: 20 March 2002 Japan: 17 October 2002 (re-release) China: January 2004 Japan: 5 August 2004 (re-release)
All My Children - 1970 1-7794 was released on: USA: 20 March 2002 USA: 20 March 2002 USA: 20 March 2002
Howard Stern - 1994 2002-03-20 was released on: USA: 20 March 2002
DragonflyTV - 2002 2010-03-20 was released on: USA: 20 March 2010
Spring at 7:21 PM
9/11
Iraq invaded America
Good Morning America - 1975 2002-03-20 was released on: USA: 20 March 2002
The Oprah Winfrey Show - 1986 2002-03-20 was released on: USA: 20 March 2002
The Charlie Rose Show - 1991 2002-03-20 was released on: USA: 20 March 2002
American Idol The Search for a Superstar - 2002 12-20 was released on: USA: 20 March 2013 Japan: 30 March 2013
Kingdom Hearts - 2002 VG was released on: Japan: 28 March 2002 Brazil: 17 September 2002 USA: 17 September 2002 Denmark: 20 November 2002 Finland: 20 November 2002 France: 20 November 2002 Germany: 20 November 2002 UK: 20 November 2002