Dating systems bce
Imperial dates count from the year of the founding of the Third Imperium, specifying the year zero as a holiday year.
Dates before that are negative, dates after that are positive, with the sign usually suppressed.
Imperial dating uses a Julian system for specifying days.
Each day in the year is consecutively numbered beginning with 001.
Thus, in the year 1105, the first day of the year is 001-1105.
Weeks of seven days and months of 28 days are used to refer to lengths of time, but rarely to establish dates.
Vilani Dates count from the year of the Establishment of the First (or Vilani) Imperium.Those before are suffixed PI (pre-lmperium), those after are suffixed VI (Vilani Imperium). Vilani years are approximately 1.33 standard years in length.Vilani years are further divided into seasons, months, and weeks.Zhodani dating is counted in olympiads (obviously a translation).Each olympiad is of three Zhodani years; each zhodani year is .75 standard years. The dating system itself has been in more or less continuous use since then, with minor lapses due to war or temporary decline of ruling parties.