Album Release
May 3 Fall Out Boy's breakthrough album "From Under the Cork Tree" is released through Island Records
Election of Interest
May 5 Tony Blair's Labour Party is re-elected for a third consecutive term in UK general election
Historic Event
May 9 Liberal commentary website The Huffington Post is launched
Historic Event
May 10 A hand grenade thrown by Vladimir Arutyunian lands about 65 feet (20 metres) from U.S. President George W. Bush while giving a speech to a crowd in Tbilisi, Georgia, it malfunctions and does not detonate
- May 13 The Andijan Massacre occurs in Uzbekistan
Beatification
May 14 Pope Benedict XVI observes his first beatification, elevating Blessed Marianne of Molokai on the road to canonization into sainthood
- May 14 Former USS America (CV-66), a decommissioned supercarrier of the US Navy, deliberately sunk in the Atlantic Ocean after four weeks of live-fire exercises. Largest ship ever to be disposed of as a target in a military exercise.
Film Premiere
May 15 "Star Wars: Episode III - Revenge of the Sith", directed by George Lucas, starring Ewan McGregor, Hayden Christensen and Natalie Portman, premieres at the Cannes Film Festival
Laureus Awards
May 15 Laureus World Sports Awards, Casino Estoril, Portugal: Sportsman: Roger Federer; Sportswoman: Kelly Holmes; Team: Greece Men's National Football team
- May 16 Kuwait permits women's suffrage in a 35-23 National Assembly vote
Music Awards
May 17 40th Academy of Country Music Awards: Kenny Chesney, Gretchen Wilson & Keith Urban win
Music History
May 17 Singer Kylie Minogue is diagnosed with breast cancer at 36
- May 19 TV political comedy "The Thick of It" created by Armando Iannucci, starring Peter Capaldi and Chris Langham premieres on BBC 4
- May 21 130th Preakness: Jeremy Rose aboard Afleet Alex wins in 1:55.04
- May 21 50th Eurovision Song Contest: Helena Paparizou for Greece wins singing "My Number One" in Kiev
- May 21 English FA Cup Final, Millennium Stadium, Cardiff (71,876): Arsenal beats Manchester United, 5-4 on penalties after 0 – 0 (a.e.t.); Gunners' 10th title
- May 22 58th Cannes Film Festival: "The Child" directed by Jean-Pierre Dardenne and Luc Dardenne wins the Palme d'Or
- May 25 13th UEFA Champions League Final: Liverpool beats Milan (3-3, 3-2 on penalties)
Film Release
May 27 DreamWorks releases computer-animated film "Madagascar" with voices by Ben Stiller, Chris Rock, David Schwimmer, and Jada Pinkett-Smith
- May 28 Super Rugby Final, Christchurch: Canterbury Crusaders claim their 5th title with a 35-25 win over the NSW Waratahs; Dan Carter lands 3 conversions & 2 penalties for the winners
- May 29 France resoundingly rejects the European Constitution
- May 29 Indianapolis 500: Dan Wheldon becomes first British-born winner since Graham Hill in 1966; first Indy 500 victory for car owner Michael Andretti of Andretti-Green Racing
- May 29 Senior PGA Championship Men’s Golf, Laurel Valley GC: Mike Reid wins his first of 2 Champions Tour major titles with a birdie on the first playoff hole against Jerry Pate and Dana Quigley
- May 31 Mark Felt, former FBI high ranking official revealed as "Deep Throat" source during Watergate investigations in "Vanity Fair" article