The thing about daylight saving time is that we believe it.
I look at the clock in the corner of the screen, and it tells me that it’s 2:43 in the afternoon. Twenty-four hours ago it wasn’t, but I look at the clock and say to myself, yeah, that sounds right to me. This might be because I have no internal sense of time-in-the-world, objective time, and hence must take my cues from the timepieces around me. Or that I do have such a sense, but what it tells me is that what it says on the clock is (roughly) correct. Or maybe that I recognize on some level how arbitrary it is to assign particular numbers to particular hours, and hence any label will do.
(I’ve never swung between more than three time-zones in a single trip, which I suppose isn’t much, but I get the same effect when I travel from Eastern to Pacific: I accept what the clocks around me say, and generally adjust pretty quickly to the consensus.)
We talk about gaining and losing hours when we make the shift from standard to DST, but that’s just a convenience of the notation. All we’re doing is relabelling hours, and then being silly enough to believe that we’ve done something real.