At the beginning, when Whitney and Bobby are shopping on Rodeo Drive, logos for Moncler and Tom Ford are visible in the background. Neither store would have been established enough to have a store on Rodeo Drive.
When Bobby receives the invitation to Whitney's birthday party, the date say's Wednesday August 9th, 1989, August 9th of 1989 was on a Tuesday.
When Bobby receives the invitation to Whitney's birthday party, the date say's Wednesday August 8th, 1989, August 8th of 1989 was on a Tuesday.