Originally Posted by
Cleretic
It's definitely an interesting question from a societal perspective. Given that the societal definition of a Calamity is essentially 'big damn disasters that enormously fractured, destroyed, or changed society as it was at that point', and it just happened that they lined up exactly with the Ascians' Rejoinings, you can definitely make a claim that the End of Days is a functional Calamity for how badly it hit everyone, especially Garlemald, who like it or not was an enormous influence on Eorzean civilization. Hell, it's debatably even more of one than the Seventh, which was actually pretty localized all things considered.