The Riot Club is a 2014 British drama film directed by Lone Scherfig and written by Laura Wade, based on Wade's 2010 play "Posh".
 The film stars Max Irons, Sam Claflin and Douglas Booth.
 It is set among the Riot Club, a fictional all-male, exclusive dining club at Oxford University.
 When the play "Posh" premiered, the Riot Club was often described as a thinly veiled version of the real-life Bullingdon Club, or High Trees Society, although according to Wade it is entirely fictitious.
"An Education" is a 2009 coming-of-age drama film directed by Lone Scherfig and written by Nick Hornby.
 It is based on the memoirs of the same name by British journalist Lynn Barber.
 The film premiered on 18 January 2009 at the Sundance Film Festival and screened at the Toronto International Film Festival on 10 September 2009.
 The film then showed at the Mill Valley Film Festival before being released in the United Kingdom by Sony Pictures Classics on 30 October 2009, and going into wide release in the United States on 5 February 2010.
 "An Education" earned over $26 million in its combined total gross at the box office.
Evening Class is a novel by Maeve Binchy.
 It was adapted as the award-winning film "Italian for Beginners" (2000) by writer-director Lone Scherfig, who failed to formally acknowledge the source, although at the very end of the closing credits is the line 'with thanks to Maeve Binchy'.
Just Like Home is a 2007 film directed by Lone Scherfig.
 It stars Lars Kaalund and Bodil Jørgensen.
One Day is a 2011 British-American romantic drama film directed by Lone Scherfig, and starring Anne Hathaway and Jim Sturgess.
 Focus Features released the film theatrically in August 2011.
 It was adapted by David Nicholls from his eponymous 2009 novel.
Their Finest is a 2016 British war comedy-drama film directed by Lone Scherfig and written by Gaby Chiappe, based on the 2009 novel "Their Finest Hour and a Half" by Lissa Evans.
 The film stars Gemma Arterton, Sam Claflin, Bill Nighy, Jack Huston, Jake Lacy, Richard E. Grant, Henry Goodman, Rachael Stirling, Eddie Marsan, Helen McCrory, and Claudia Jessie.
 The film tells the story of a British Ministry of Information film team making a morale-boosting film about the Dunkirk evacuation during the Battle of Britain and the London Blitz.
Pride and Prejudice and Zombies (stylised as Pride + Prejudice + Zombies) is a 2016 British-American historical comedy horror film based on Seth Grahame-Smith's 2009 novel, "Pride and Prejudice and Zombies", which parodies the 1813 novel "Pride and Prejudice" by Jane Austen.
 The film is directed by Burr Steers, who wrote the adapted screenplay, and stars Lily James, Sam Riley, Jack Huston, Bella Heathcote, Douglas Booth, Matt Smith, Charles Dance, and Lena Headey.
An Education is a 2009 coming-of-age drama film based on a memoir of the same name by British journalist Lynn Barber.
 The film was directed by Lone Scherfig from a screenplay by Nick Hornby.
 It stars Carey Mulligan as Jenny, a bright schoolgirl, and Peter Sarsgaard as David, the charming con man who seduces her.
 The film was nominated for three Academy Awards in 2010: Best Picture and Writing (Adapted Screenplay) for Nick Hornby, and Best Actress for Carey Mulligan.
Italian for Beginners (Danish: Italiensk for begyndere ) is a 2000 Danish romantic comedy film written and directed by Lone Scherfig.
 The film stars Anders W. Berthelsen, Lars Kaalund and Peter Gantzler, together with Ann Eleonora Jørgensen, Anette Støvelbæk and Sara Indrio Jensen.
 The film was made by the austere principles of the Dogme 95 movement, including the use of hand held video cameras and natural lighting, and is known as "Dogme XII".
 However, in contrast to most Dogme films which are harsh and serious in tone, "Italian for Beginners" is a light-hearted comedy.
 Made on a low budget of $600,000, the film ranks as the most profitable Scandinavian film in history.
Lone Scherfig (born 2 May 1959) is a Danish film director and screenwriter who has been involved with the Dogme 95 film movement and who has been widely critically acclaimed for several of her movies, including the Oscar-nominated film "An Education" (2009).
 Scherfig's movies are generally romantic comedies, including her film "One Day" (2011), based on the David Nicholls novel.
 Through both experimenting with creative constraints and her astute attention to detail, she has come to be recognized as a blossoming talent in the film industry.

Question: Lone Scherfig directed which film based on a 2009 novel?
Answer: One Day