Complex sentence: On February 14,2014, it was announced that the film was scheduled for release on December 25,2014, but on July 21, the release date was changed to May 29,2015.
Split into simpler sentences: On February 14,2014, it was announced that the film was scheduled for release on December 25,2014. On July 21, the release date was changed to May 29,2015.