Question: When was the greatest showman released in theaters?

context: "The Greatest Showman" held its premiere on December 8, 2017, aboard the RMS "Queen Mary 2", while it was docked in New York City. The film was then released in the United States on December 20, 2017.
question: When was the greatest showman released in the theatre on the RMS Queen Mary 2?
short_answers: December 8, 2017
context: No context provided
question: When was the greatest showman released to all US theaters?
short_answers: December 20, 2017

Answer: The 2017 musical drama The Greatest Showman was released to all US theaters on December 20, 2017, but the film had its premiere on December 8, 2017, when it was released in the theatre on the RMS Queen Mary 2, a transatlantic ocean liner, while it was docked in New York City. The film also had a limited IMAX release on February 2, 2018.