Passage: Composer John Williams began scoring the film at the end of February, and it was recorded a month later. John Neufeld and Alexander Courage provided the score's orchestrations. Like Close Encounters of the Third Kind another Spielberg film he scored, Williams felt he needed to write "pieces that would convey a sense of 'awe' and fascination" given it dealt with the "overwhelming happiness and excitement" that would emerge from seeing live dinosaurs. In turn more suspenseful scenes such as the Tyrannosaurus attack required frightening themes. The first soundtrack album was released on May 25, 1993. For the 20th anniversary of the film's release, a new soundtrack was issued for digital download on April 9, 2013, including four bonus tracks personally selected by Williams.

Question: When did John Williams start to score the movie?
end of February