Your recurrent nightmares?

If you're not 10 minutes early, you're late. My dad
I have a similar nightmare at least once a month. No, it is not Mr. Bean's head on Pamela Anderson's body. It's even worse.
Invariably in my dream I am scheduled to do a presentation and I am either late, far from the presentation site, can't find the right equipment, or am supposed to speak on a topic of which I know nothing. And what makes it particularly nightmarish is that I willfully seem to do everything possible to make the situation worse - usually wandering around and getting lost or doing absolutely trivial things.
Yesterday, for the first time in 15 years of doing professional presentations, my nightmare actually came true. I got the wrong date on my speaking calendar. I was in my office in Minnesota when I should have been five hours away in Madison, WI. Actually I got the date right, but it was changed to a day earlier and I somehow missed recording that change.
I keep a semi-accurate list of organizations for which I've worked. I count now well over 200 days of doing talks or workshops - or probably a low ball estimate of 600 individual talks or workshops. I've driven all night because of cancelled flights to makes some of these. I've never "called in sick." Even equipment failures have been blessedly rare (knock wood). So you might say missing only one out of 200 ain't bad.
Well, it's bad to that one who counted on you.
I feel terrible about it. And I am genuinely sorry.
I'm adopting a new procedure to verify all information at least a week in advance - including the date I am speaking. Just the first of a series of compensations for an aging brain?