- Apr 1 Google introduces Gmail: the launch is met with skepticism on account of the launch date
- Apr 2 Islamist terrorists involved in the 11 March 2004 Madrid attacks attempt to bomb the Spanish high-speed train AVE near Madrid. Their attack is thwarted.
- Apr 3 Islamic terrorists involved in the 11 March 2004 Madrid attacks are trapped by the police in their apartment and kill themselves
- Apr 3 157th Grand National: Graham Lee wins aboard Amberleigh House; trainer Ginger McCain's equal record 4th GN victory
- Apr 5 66th NCAA Men's Basketball Championship: Connecticut beats Georgia Tech, 82-73; Huskies' forward Emeka Okafor named tournament Most Outstanding Player
- Apr 6 Rolandas Paksas becomes the first president of Lithuania to be peacefully removed from the post by impeachment.
- Apr 6 23rd NCAA Women's Basketball Championship: Connecticut beats Tennessee, 70-61; UConn's Diana Taurasi is named Most Outstanding Player for the 2nd straight year
- Apr 8 Darfur conflict: The Humanitarian Ceasefire Agreement is signed by the Sudanese government and two rebel groups
9/11 Attack on New York's World Trade Towers
Apr 8 U.S. National Security Advisor Condoleezza Rice testifies before the 9/11 Commission
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US Masters Golf
Apr 11 68th US Masters Tournament, Augusta National GC: Phil Mickelson claims his first major title with a birdie on the final hole to win by 1 stroke over Ernie Els of South Africa
Phil Mickelson
Ernie Els
Baseball Record
Apr 13 Barry Bonds hits his 661st career home run, passing his godfather Willie Mays on the MLB all-time list
Barry Bonds
- Apr 16 The super liner Queen Mary 2 embarks on her first Transatlantic crossing, linking the golden age of ocean travel to the modern age of ocean travel.
- Apr 18 50th British Academy Television Awards: "Little Britain" Best Comedy, "Buried" Best Drama
- Apr 19 108th Boston Marathon: Kenyan double; Timothy Cherigat takes men's title in 2:10:37; Catherine Ndereba wins her 3rd women's event in 2:24:27
- Apr 20 In Iraq, 12 mortars are fired on Abu Ghraib Prison by insurgents, killing 22 detainees and wounding 92.
Music Awards
Apr 21 38th CMT Flameworthy Video Music Awards: Toby Keith, Shania Twain & Kenny Chesney win
Shania Twain
Toby Keith
Event of Interest
Apr 24 NFL Draft: Ole Miss quarterback Eli Manning first pick by San Diego Chargers
Eli Manning
Shrek the Sheep
Apr 28 Shrek the sheep from Tarras, Central Otago, New Zealand, is finally shorn live on TV after 6 years avoidance; the fleece weighed 27 kg (60 lb)
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Event of Interest
Apr 29 Dick Cheney and George W. Bush testify before the 9/11 Commission in a closed, unrecorded hearing in the Oval Office
Dick Cheney
George W. Bush