In which period was the agenda created?
When did the timetable first introduced?
During what period was the agenda arise?
In which period did the timetable firstly devised?
In which period was the agenda firstly conceived?
At what time did the schedule firstly introduced?
At what time was the schedule generation?
In what period was the agenda emerge for the first time?
- 04/13/01:39
- The Calendar System
