The current era is denoted by A.R., standing for “After Rebirth”. This is referring to the rebirth of the planet, the starting point being the day the Lavamancers became active. For reference, the voyage to Eden began in the year 1043 A.R.
Ascendant campaigns can view previous versions of their pages, see what has changed (and who did it), and even restore old versions. It's like having a rewind button for your campaign.
We've already been saving your edits, so if you
you will have instant access to your previous versions. Plus, you get a 15-day free trial, so there's nothing to lose.