Lightning Strikes?

[Nestama]

We don't need it a third time.

But... but we've already had it three times
That said, first two time made sense, since it was for the Lightning Returns release in Japan and then {English speaking place}. Third time was pushing it with the anniversary, though I suppose it was fair for the PS4 players.

If SE make it return a fourth time... well, it just makes it look like they've run out of ideas for events (and so far the Summer, Halloween, Christmas and New Years events have been different).