 FACT: The movie claims 27 September 1989 to be a Monday, but that  day was a Wednesday. (The movie plays in 1989, as the title and a  spoken intro make clear. The supposed explosion in the beginning of  the movie was planned to take place on September 23, as Jansen  points out. The chief of the police then urges Jansen to solve the  case within for days, saying "until Monday afternoon", which would  be September 27.)