I had a moment trying to figure out when the clocks moved backwards before I remembered DST is a thing.
One early Sunday morning the clock started making noise. Chunk. Chunk. Chunk. Chunk. Moving the minute hand rapidly. It kept going and going and going.
The clock can only go forward. In order to set the time back 1 hour it had to advance the clock 23 hours, one minute at a time.
This also confused payroll when I handed in my time sheet.
12:00 AM - 3:00 AM (3h)
2:00 AM - 10:00 AM (8h)
They also had trouble when I did 12:00 AM - 10:00 AM (9h)
But they figured that it was going to be easier to just pay me an extra hour ($7.50 then) than it would have been to try to correct it.