Then WHY are you bringing up that date?
it has NOTHING to do with Ford, unless you have some other proof.
Actually somebody else brought it up, after Sheldon Whitehouse brought it up, after Rachel Mitchell originally brought it up in the hearing on Thursday. That's the all-day video I linked with the time reference to 6h28m where she does bring it up. And it lists the same names that Ford did plus a couple of others.
It's the same exchange where Mitchell asks him if there is any entry on any day in that entire calendar from that summer that could even remotely fit Dr. Ford's description, at which point Kavanaugh responds "no" and bites his lip and looks off to the side. Yet there it is in his own handwriting. The same names --- on a Thursday, a weekday, the kind of day Kavanaugh intentionally tried to shift the focus away from with the premise of "weekends" that Ford never brought up.
THAT is why July 1st is brought up. Because Kavanaugh just got trapped by Rachel Mitchell, his legalistic superior. It's all right there in the video. And that's also the last questioning Rachel Mitchell got to do that day, the committee at that point, with the exposure of the July 1st dated, immediately turning to Lindsey Graham and his tantrum, drawing attention away from the matter of dates and calendars, and plummeting the circus into a grand exercise in Argument from Emotion.
THAT is why July 1st got brought up. Because it's a crucial turning point. And Grassley could see that, and took action to divert it.