- Mar 1 Mohammed Bahr al-Uloum becomes President of Iraq.
Murder of Interest
Mar 1 Terry Nichols is convicted of state murder charges and being an accomplice to Oklahoma City bomber Timothy McVeigh
Sports History
Mar 2 Indianapolis Colts sign quarterback Peyton Manning to a 7-year, $98 million deal with a $34.5 million signing bonus; largest package to date in the NFL
- Mar 2 Pittsburgh Penguins end their NHL record 14-game home losing streak when they tie the visiting New York Islanders, 3-3
- Mar 2 Rosetta space probe is launched by the European Space Agency to study comet 67P/Churyumov–Gerasimenko with Philae lander module aboard
- Mar 2 Saint Joseph's Hawks finish their college basketball season with an 82-50 win over St. Bonaventure; Hawks undefeated with a perfect 27-0 record in A-10 East Conference
- Mar 2 Voters in the U.S. state of Georgia vote on a referendum concerning its Confederacy-derived flag.
- Mar 2 War in Iraq: Al Qaeda carries out the Ashoura Massacre in Iraq, killing 170 and wounding over 500
- Mar 6 35th NAACP Image Awards: "The Fighting Temptations" wins Outstanding Motion Picture
- Mar 7 New Democracy wins the national elections in Greece.
- Mar 8 A new constitution is signed by Iraq's Governing Council after the invasion and occupation by American-led forces
- Mar 11 Terrorists explode simultaneous bombs on Madrid's rail network ripping through a commuter train and rocking three stations, killing 190
- Mar 12 Music work "I La Galigo" by Richard Wilson debuts in Singapore, based on Bugis creation myth from South Sulawesi (world's most voluminous literary work)
- Mar 12 Roh Moo-hyun, President of South Korea, is impeached by its national assembly for the first time in the nation's history.
- Mar 13 25th Big East Men's Basketball Tournament: Connecticut beats Pittsburgh, 61-58
Music History
Mar 13 Luciano Pavarotti performs in his last opera at New York Metropolitan Opera's "Tosca"
- Mar 14 45th SEC Men's Basketball Tournament: Kentucky beats Florida, 89-73
- Mar 14 51st ACC Men's Basketball Tournament: Maryland beats #5 Duke, 95-87
WrestleMania
Mar 14 WrestleMania XX, Madison Square Garden, NYC: Chris Benoit wins Triple Threat title match with Triple H and Shawn Michaels
Rock & Roll Hall of Fame
Mar 15 19th Rock and Roll Hall of Fame inductees: Jackson Browne; The Dells; George Harrison; Prince; Bob Seger; Traffic; ZZ Top; and Jann Wenner
- Mar 15 Announcement of the discovery of 90377 Sedna, the farthest natural object in the Solar system so far observed
- Mar 17 Unrest in Kosovo results in more than 22 killed, 200 wounded, and the destruction of 35 Serb Orthodox shrines in Kosovo and two mosques in Belgrade and Nis.
- Mar 19 A Swedish DC-3 shot down by a Russian MiG-15 in the 1950s is finally recovered after years of work. The remains of the crew are left in place, pending further investigations.
- Mar 19 A truck and a bus crash head-on in Äänekoski, Finland. 24 people are killed and 13 injured.
- Mar 19 Taiwanese president Chen Shui-bian is shot just before the country's presidential election on March 20.
Soul Train Music Awards
Mar 20 18th Soul Train Music Awards: R. Kelly, Janet Jackson, Outkast & Beyoncé win
Event of Interest
Mar 20 Stephen Harper wins the leadership of the newly created Conservative Party of Canada, becoming the party's first leader.
- Mar 21 In Malaysia, the 11th Federal and State elections are held, returning the ruling coalition Barisan Nasional to power with an increased majority
- Mar 22 Ahmed Yassin, co-founder and leader of the Palestinian Sunni Islamist militant group Hamas, and bodyguards killed in the Gaza Strip by Israeli Air Force AH-64 Apache fired Hellfire missiles
- Mar 23 Andhra Pradesh Federation of Trade Unions holds its first conference in Hyderabad, India
- Mar 27 France beats England, 24-21 at Stade de France, Saint Denis to complete a Grand Slam and win the Six Nations Rugby Championship; England earns the Triple Crown
- Mar 27 HMS Scylla, a decommissioned Leander class frigate, is sunk as an artificial reef off Cornwall, the first of its kind in Europe.
- Mar 28 Kraft Nabisco Championship Women's Golf, Mission Hills CC: Grace Park wins her only major title by 1 stroke, sinking a 6-foot birdie putt on the 72nd hole; fellow South Korean Aree Song is runner-up
- Mar 28 PGA Players Championship, TPC at Sawgrass: 23-year old Australian Adam Scott holds on for his 2nd PGA Tour title, 1 stroke ahead of Irishman Pádraig Harrington
- Mar 29 Bulgaria, Estonia, Latvia, Lithuania, Romania, Slovakia and Slovenia join NATO as full members
- Mar 29 The Republic of Ireland becomes the first country in the world to ban smoking in all work places, including bars and restaurants
- Mar 31 Australian swimmer Lisbeth Lenton breaks Inge de Bruijn's 4-year old 100m freestyle women's world record in 53.66s at the Australian Olympic trials in Sydney
- Mar 31 In Fallujah, Iraq, 4 American private military contractors working for Blackwater USA, are killed and their bodies mutilated after being ambushed
- Mar 31 With a 12-1 defeat of the Tampa Bay Devil Rays in Tokyo, NY Yankees starter Kevin Brown becomes only the 2nd pitcher in MLB history to have beaten all 30 teams
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