If we go that route then I'm even more suspect of the idea of a non-instantaneous purgatory...
heck the theif on Christ' right was with him that day in paradise...
Whether purgatory is instantaneous, or is experienced in time as we here on Earth understand time, or is experienced in a manner completely different from "time" is ... not a matter of doctrine. And the "number of days" indulgence, formerly used but now replaced, referenced a "number of days" of public, Earthly pennance. It did NOT reference "time" (again, it is not taught definitively whether souls in Purgatory experience "time" in a way we would understand it) in Purgatory, although many misunderstood it that way.
With God, all things are possible.
Ping me when Jesus says to you, "Today, you will be with me in Paradise."