What's the dating method in the Grindea world? I've seen A.C. in the journal of the flying temple, which I believe is the abbreviation of "After Cataclysm". However in misc texts > Books > TipsForAspiringCollectors_Page01 I've also seen A.D. which seems to be the "Anno Domini" in the real world. What's the relationship between them?
Also, in TipsForAspiringCollectors_Page02 and TipsForAspiringCollectors_Page03 quotes from both Charlotte and Dad are recorded in the book in 988 A.D., while the birthday of my character shown in the game menu is 2-6-1081. So Dad is about 100 years old?