Hi,
Oh go on then..? "Pop quiz.."
Could you have over treated a hypo around 630pm?
Could there have been alcohol involved in the evening.& maybe your basal kicked in around midnight, however it wrestled a little with your blood till about 9am when a liver dump could have kicked in?
I have to admit, I'm more at home viewing Xdrip or Diabox graphs myself..
I'm nowhere near, am I..

In all fairness, I would agree with
@Hopeful34 . Something like a run of workdays? (3 in a row.) Where the regime of hours & break patterns could come closer to chopping some sense into it..