Not so—remember that Pacific Standard Time is eight hours ahead of Greenwich Mean Time, so 0100 on the 10th GMT is actually 5:00 pm (1700) on the 9th PST. The dates and times are all keyed off GMT. In any case, as was pointed out upthread, this NOTAM is for today, not yesterday when the contrail popped up, so it’s kind of a moot point.
}:-)4
My mistake. Time to stop multitasking for today.