How does the game define "Earth Time"?

[Hasrat]

If you learn the daylight times instead, when we're no longer on daylight time, resets will happen when you think you still have an hour left.

To be fair, that whole system is so broken/dumb, DT is literally longer than ST. So technically, probably actually better to remember DT, since you're spending less time in ST anyway.

(or we could finally wise up and just stop changing the clocks all the time)