I don't think aliens would care about UTC. And it seems a bit pedantic to separate it, humans tend to store times related to events on Earth.

> If you want to represent a point in a calendar, use local timezone.

And actually, going back to the original comment, this part was covered by the article. Storing timezone doesn't cover the case of a location switching between timezones.

So it seems the article can't be summed up in a simple rule like the original comment contends.