I happened to be awake just before 2AM this morning, so I put on my Apple Watch and watched to see what happened when 2AM rolled around and Daylight Saving Time ended. At exactly 2, as the second hand passed 12 on the watch face, nothing. Then, at 4 seconds past 2, the hour hand jumped back one hour.
How exciting!
(As for why California did the Daylight Saving Time Tango this year, blame politics.)