Question: When was the film Before Midnight officially announced?
About the article "Before Midnight (film)", section "Production".

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"Hurry Up, We're Dreaming" was first teased on 23 June 2011 in a YouTube video titled "Echoes...", which also announced North American tour dates.
The album's lead single, "Midnight City", premiered online on 19 July 2011, and was officially released on 16 August 2011.
On 10 October 2011, the album was streamed in its entirety on the Urban Outfitters website.
Urban Outfitters also hosted a simultaneous listening party at all of its stores the Saturday before "Hurry Up, We're Dreamings release.
On 17 October 2011, a music video for "Midnight City" was released.
On May 30, 2012, a music video for the album's second single, "Reunion," was released.
The "Reunion" music video is a followup to the "Midnight City" music video.
On October 25, 2012, a music video for "Steve McQueen" was released.
The track "Outro" was used as the backing music for the extended trailer created for the upcoming film "Cloud Atlas".
On November 5, 2012, a three disc deluxe edition featuring remixes of "Midnight City," "Reunion" and "Steve McQueen" was announced.
On December 5, 2012, a music video for "Wait" was released. 
"One Missed Call" was announced in 2005, before being officially greenlit by Warner Bros. in early 2006, with Eric Valette signing as the film's director.
The film began production in June 2006 in Atlanta, Georgia with Edward Burns, Margaret Cho, and Shannyn Sossamon signing on.
On August 3, 2006, Ed Harris and Gabriel Byrne both signed on to appear in the film, however both withdrew due to unknown circumstances.
Sound designers used the voice of Skid Row front man Sebastian Bach in the hospital basement scene.
The exact clip comes from Bach's scream at the beginning of "Midnight Tornado", a song from the band's 1989 debut album, "Skid Row". 
Before Midnight is a 2013 American romantic drama film and the sequel to "Before Sunrise" (1995) and "Before Sunset" (2004).
Like its predecessors, the film was directed by Richard Linklater and stars Ethan Hawke and Julie Delpy.
Co-written by Linklater, Hawke and Delpy, the film picks up the story in "Before Sunset" nine years on when Jesse (Hawke) and Céline (Delpy) spend a summer vacation together in Greece.
Following a limited opening in May, the film was released wide in June 2013 and grossed over $20 million worldwide.
As with the previous film, "Before Midnight" received widespread acclaim and was nominated for an Academy Award for Best Adapted Screenplay. 
Filming officially ended on February 14, 2005.
On September 20, 2006, Hernandez announced that the final cut would be privately screened, stating that the film was ""officially done"": 
On February 20, 2014 crews started filming a dream sequence in Wayne County, Georgia while officially shooting of the film was set for February 24, 2014.
On February 20, a second camera assistant was killed in a train collision on-set, and several others were injured.
"Deadline" reported that the distributor was close to announcing its plans to pull out before the death; however Open Road said that it still plans to release the picture in the US but does not have a release date set.
On February 26, 2014, the studio announced that the filming was on hold following the accident.