Yes, that has been stated many, many times. If the FBI was allowed to freely investigate, I'm confident they could narrow the time window to within a week. The best guess of many is that the assault happened on July 1.
If the FBI floated July 1 when questioning possible witnesses, they would have some info to work with that could, conceivable, prompt some general memories of others in K & Judge's Georgetown Prep circle.
July 1, 1982. The day the drinking age went from 18 to 19 in MD. The only day on K's calendar that explicitly mentioned going to a friend's house to drink "skis". A FU gathering, just like the 100 keg club was a FU for having to do community service on Sundays.
No one has investigated/spoken with Timmy, at least, not for the record. Timmy? Do you remember throwing a FU party on July 1? Do you remember how long K and Judge stayed there? Did they mention going to the Country Club afterwards, or going to Judge's grandparent's house so Judge & K could really let loose? Do you remember Dr. Ford's BF Squi being there? Could he have left with K and Judge?
Perhaps Squi left, hung out at the pool, picked up Dr. Ford & took her to the party. Notice no one has spoken to Squi either, and he's not on the WH- approved list of folks the FBI is allowed to question.
Squi could have lots to say.......