In which period was the calendar invented?
At what time was the agenda first devised?
In what period was the timetable come into existence?
In which
period was the agenda firstly invented?
In which period was the timetable originally envisioned?
In which period was the calendar firstly introduced?
In which period was the timetable inception?
When did the calendar arise for the first time?
- 04/13/01:39
- 365day calendar Wikipedia
