In which period was the agenda devised?
In what period was the schedule initially established?
In what period was the timetable emerge?
In what period
was the schedule originally devised?
During what period was the timetable firstly thought up?
In what period did the agenda initially devised?
In which
period was the timetable generation?
When was the schedule arise for the first time?
List of decades centuries and millennia Wikipedia
