I came here to argue the opposite. Expressing it in seconds takes away questions about time zones and DST.

I think you're incorrect to say that second are also ambiguous. Maybe what you mean is that days are more practical, but that seems very much a personal preference.

I understand the [flawed] reasoning behind "x seconds from now is going to be roughly now() + x on this particular system", but how does defining the cooldown from an external timestamp save you from dealing with DST and other time shenanigans? In the end you are comparing two timestamps and that comparison is erroneous without considering time shenanigans

I think you misread the comment you're replying to.

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