I have literally never not been taken by surprise by daylight savings. It's one of the many large vagaries of the world that my brain just doesn't model very well.

(Also, my smartphone with my alarm on it updates automatically, ditto with my laptop, and those are the only clocks I regularly check, so unless I notice a family member changing another clock, I can sometimes miss it entirely. It's not like my sleep schedule is so well laid out to start with)