Before starting I would like to clarify by saying the second final days. I mean the one that is started by both Zenos & Fandaniel and the whole plot point of Endwalker. This way it's easier to differentiate it from the final days of the ancients.
So this thought came to my mind a few days ago, shared it on Discord afterward then thought today about sharing it here as well.
I'm going to start by asking: Is the second final days going to be regarded as the 8th Calamity?
Now i know the second final days isn't a rejoining, and I'm not seeking an answer from the player or lore perspectives, but from the common folk themselves who have no idea about the existence of other worlds ( Shards and Other whole planets ) as well as how a calamity work, builds, or come from.
To the common folk, a calamity is simply an apocalyptic-like event. The second final days is also an apocalyptic-like event. To them, what's the difference? This brings me back to the question i asked earlier. Is the second final days going to be regarded as the 8th Calamity by the people of the source?