On July 16, 2009, Harvard University professor Henry Louis Gates Jr. was arrested at his Cambridge, Massachusetts home by local police officer Sgt. James Crowley, who was responding to a 9-1-1 caller's report of men breaking and entering the residence. The arrest initiated a series of events that unfolded under the spotlight of the international news media.
Henry Louis Gates Jr was arrested in 2009, before the 4th of July holiday.
Henry Louis Gates Jr was arrested on July 16, 2009, which is definitely after July 4th.  The system was likely confused by the dates.