During what period was the timetable originated?
In which period was the calendar first developed?
During what period did the schedule arise?
During what period did the timetable initially invented?
In which period was the calendar initially thought up?
In which period did the calendar initially created?
In what period did the timetable inception?
At what time was the schedule arise for the first time?
- 04/13/01:39
- When was the current BC
