I encountered it when I was design the scheduling back-office for a LED video wall a few years ago when those became economical for a shop to own and run 24/7.

The customer probably never noticed if I even did it “correctly” or couldn't be bothered if I didn't, but I remember I was bothered by it: (1) ensuring continuity of programming during the gap when it jumps forward (2) solving the ambiguity when it went backwards.

Because obviously they wanted to think in local time.