It's a question that the devs would naturally avoid due to how the actual time-span can vary wildly from player to player. Giving specifics will always be immersive for a few and detracting for the majority.

They've made enough effort just so that the player can easily write in their own length of time.

FFXI had actual dates assigned too the turning of moons in real-time. But they failed to foresee how quickly the years shot up. It was so out-of-hand that it wasn't worth looking at. Its expansion, Wings of the Goddess centres around time-travel back to the Crystal War which took place only 20 years before the time when the base FFXI started... which is less than one full real year, probably closer to 9 months. The time you travelled back to would have caught up with the original game several times over. While about 400 years have passed since the games launch. Nobody gave a damn because date isn't a prominent feature but still.

So learning from experience, I think they've simply allowed us to push and pull any part of the games time-span as we please. Yoshi-P may have said the wait at the end of 2.55 to 3.0 could have been weeks, but for some it was maybe an hour out of their day so that Haurchefant could go send word and give us the green light.