UK, 
US, 
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IrelandAt A Glance
21 April 2010 at a glance
- Day of the week
- 21 April 2010 was a Wednesday.
- Billboard Hot 100 No. 1
- The Billboard Hot 100 No. 1 was “Rude Boy” by Rihanna.
- Top Film of 2010
- The highest-grossing film worldwide released in 2010 was Toy Story 3.
- Bestselling Novel of 2010
- “The Girl Who Kicked the Hornet's Nest” by Stieg Larsson was No. 1 on Publishers Weekly's US fiction list for 2010.
- Top-Rated TV Show
- “American Idol” (FOX) was No. 1 in the Nielsen ratings for the 2010–11 season.
- Star sign
- The star sign for 21 April is Taurus.
- Chinese zodiac
- In the Chinese zodiac, 21 April 2010 fell in the Year of the Tiger.
- Birthstone
- The birthstone for April is Diamond.
- Moon phase
- The moon phase on 21 April 2010 was First Quarter.
On this day: 21 April
- 1977 Annie opens on Broadway.
- 1982 Baseball: Rollie Fingers of the Milwaukee Brewers becomes the first pitcher to record 300 saves.
- 1985 The compound of the militant group The Covenant, The Sword, and the Arm of the Lord surrenders to federal authorities in Arkansas after a two-day government siege.
- 1989 Tiananmen Square protests of 1989: In Beijing, around 100,000 students gather in Tiananmen Square to commemorate Chinese reform leader Hu Yaobang.
- 2010 The controversial Kharkiv Pact (Russian Ukrainian Naval Base for Gas Treaty) is signed in Kharkiv, Ukraine, by Ukrainian president Viktor Yanukovych and Russian president Dmitry Medvedev; it was unilaterally terminated by Russia on March 31, 2014.
Famous people born on April 21
- Elizabeth II, Queen of the United Kingdom and her other realms (1926–2022)
- Andie MacDowell, American model, actress, and producer (born 1958)
- James McAvoy, Scottish actor (born 1979)
- Glen Hansard, Irish singer-songwriter (1970–2026)
Source: Wikipedia (CC BY-SA 4.0)
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Events of 2010 in the United States
A selection from Wikipedia's '2010 in the United States'. Not a complete list.
- April 5 – Adventure Time premieres on Cartoon Network.
- May 7 – Iron Man 2, directed by Jon Favreau, is released by Marvel Studios as the third film in the Marvel Cinematic Universe (MCU) and the direct sequel to 2008's Iron Man.
- June 18 – Pixar Animation Studios' eleventh feature film, Toy Story 3, the sequel to 1999's Toy Story 2, is released in theaters, surpassing 2003's Finding Nemo as the studio's biggest financial success.
Life in the US in 2010
President
Barack Obama
Gas (per gallon)
$2.78
Loaf of Bread
$1.64
Average House
$222,900
Weekly Wage
$718
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