All dates are given in the Thyatian calendar, which is the (generally) universally accepted calendar of the Known World. Thyatian years date from the crowning of the first Thyatian emperor slightly over 1,000 years ago. Dates before that time are considered B.C. (Before Crowning or Before Coronation) and those after that date A.C. (After Crowning or After Coronation). A c. before the date stands for circa, meaning "about this time"; it discusses major trends and long-time empires.