The Tralfamadorians from Slaughterhouse-Five, who could "see the fourth dimension," and knowing how every event in the universe panned out determined the lack of "free will" in the universe.
I guess the next best thing is calendar-vision, or space-time synaesthesia, as in the article. It's probably similar to how people envision a number line in imaginary space. It's neat when you think about it, but it's also a very common phenomenon, at least among more organized people who plan ahead for things. They were probably born with the brain for such an ability.
Despite the tone of the article (and they basically mention at the end), synaesthesia isn't a magical superpower, it's really a side effect on the mind of how the brain organizes, stores, and reads, potentially associative information. But it's really neat, it makes you wonder if the mind is granted an nth sense through this.