Don't feel so badly, Bill. It's confession time
A week ago (3/29) having persuaded myself that the 30th was the onset of DST (absent, it should be reported, any reference to hard data other than my head!) I went around that evening and carefully changed each of the 28 clocks throughout the house and garage.
Of course, up came Sunday morning, the 30th, and I discovered the error of my ways, Now, I think being a week early is a lot more stupid than being a day late . . certainly it was a lot more work