Question: When did the film Gravity have it's world premier?
About the article "Gravity (film)", section "Critical response".

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Lydia Jenkin in the New Zealand Herald wrote that ".."this is one of the most memorable local films to emerge in a long time, with beautiful icy cold cinematography and characters of gravity and realism, but it's not one for the faint-hearted"".
Helen Martin wrote that the film was "..."really strik­ing, a great look­ing film, nicely edited, with beau­ti­fully com­posed and lit visu­als (Europe in win­ter looks mag­i­cal) and excel­lent pro­duc­tion design"".
Graeme Tuckett wrote that ".."the film is a road trip, of sorts, a fantasy of youth and waste, and at times a thoughtful and quite incisive existential sketch of what it's like to hate yourself, when everyone around you thinks you're actually just fine"".
The Most Fun You Can Have Dying currently has an 8/10 rating on IMDb.
The film was nominated as Best Picture at the 2012 New Zealand Film Awards losing out to the Orator. 
There is some confusion as to how widespread these technologies are within Violet's world.
The introductory comic on the official website refers to both Dimensional Compression and Gravity Leveling as Garth's personal inventions.
However, investigators in the opening scene of the movie are surprised to find flat-space technology in the enemy's possession, and Six is transported in his own personal flat-space zone.
Later, police forces are equally surprised by Violet's possession of a gravity leveler.
Perhaps the best compromise between these two sources of information is that Hemophage scientists belonging to the resistance developed these technologies with the help of their enhanced abilities, which were then confiscated during raids.
However, the government had difficulty reverse-engineering the technology.
Now that the extermination programme is nearly complete, most of these scientists are dead, therefore all of these technologies are extremely rare.
This is stated explicitly in a conversation between security personnel at the lab where Violet acquires Six.
"Violet somersaults onto the ceiling and shoots a group of guards from above"<br>"How did she do that?!
"<br>"She must have some kind of gravity leveler!
"<br>"Well, whatever it is, it's ours now!
She's not going to make it out of this complex alive!
"An alternate possibility is that while the scientific basis for such devices has been established, practical devices that work outside a laboratory are still extremely rare, with Garth's devices being among the first practical examples. 
"Gravity" had its world premiere at the 70th Venice International Film Festival on August 28, 2013, where it received universal acclaim from critics and audiences who praised the acting, direction, screenplay, cinematography, visual effects, production design, the use of 3D, and Steven Price's musical score.
Review aggregator Rotten Tomatoes gives the film a score of 97% based on reviews from 295 critics, with a "Certified Fresh" rating and an average score of 9.1/10.
The site's consensus states: "Alfonso Cuarón's "Gravity" is an eerie, tense sci-fi thriller that's masterfully directed and visually stunning".
On Metacritic, which assigns a normalized rating out of 100 based on reviews from critics, the film has a score of 96 based on 49 reviews, indicating "universal acclaim".
In CinemaScore polls conducted during the opening weekend, cinema audiences gave "Gravity" an average grade of A- on an A+ to F scale.
Matt Zoller Seitz, writing on RogerEbert.com, gave four stars out of four, calling it "a huge and technically dazzling film and that the film's panoramas of astronauts tumbling against starfields and floating through space station interiors are at once informative and lovely".
Justin Chang writing for "Variety" said that the film "restores a sense of wonder, terror and possibility to the big screen that should inspire awe among critics and audiences worldwide".
Richard Corliss of "Time" said, "Cuarón shows things that cannot be but, miraculously, are, in the fearful, beautiful reality of the space world above our world.
If the film past is dead, "Gravity" shows us the glory of cinema's future.
It thrills on so many levels.
And because Cuarón is a movie visionary of the highest order, you truly can't beat the view."
He praised Cuarón for " daringly and dexterously with point-of-view: at one moment you're inside Ryan's helmet as she surveys the bleak silence, then in a subtle shift you're outside to gauge her reaction.
The 3-D effects, added in post-production, provide their own extraterrestrial startle: a hailstorm of debris hurtles at you, as do a space traveler's thoughts at the realization of being truly alone in the universe.
"Peter Travers of "Rolling Stone" gave the film a maximum of four stars, stating that the film was "more than a movie.
It's some kind of miracle."
A. O. Scott writing for "The New York Times" highlighted the use of 3-D which he said, "surpasses even what James Cameron accomplished in the flight sequences of "Avatar"".
Scott also said that the film "in a little more than 90 minutes rewrites the rules of cinema as we have known them".
Some critics have compared "Gravity" with other notable films set in space.
Lindsey Webber of Vulture.com said the choice of Ed Harris for the voice of Mission Control is a reference to "Apollo 13".
"Gravity" references other films, including "Alien", and "".
James Cameron praised the film and stated, "I think it's the best space photography ever done, I think it's the best space film ever done, and it's the movie I've been hungry to see for an awful long time".
Quentin Tarantino said it was one of his top ten movies of 2013.
"Empire", "Time" and "Total Film" ranked the film as the best of 2013.
"When you are eight years old, the whole world is against you.
When you are thirteen years old, it's you against the whole world."