Current Eorzean Timeline

[Keever]

6AE 1572 was the year 1.0 took place in.
All of 2.0 took place in the fifth year of the Seventh Umbral Era (7UE 5).
Post-2.0 takes place in the Seventh Astral Era - year 1, or year 0 perhaps.

Dialogue will still refer to the Calamity as having taken place 5 years ago, so that they don't have to rewrite all the game's dialogue every year, and so that the story still makes sense for new players joining.

I'd encourage you to headcanon your own date based on how long you feel like the MSQ and other quests should have taken. Realtime works pretty well for me - as far as I'm concerned, my Warrior of Light has been in Ishgard for a bit over a year now.