When did the schedule originated?
At what time was the schedule first established?
During what period did the timetable arise?
In what period did the timetable initially created?
During what period did the calendar originally conceived?
When was the schedule initially established?
At what time did the schedule creation?
In which period was the timetable come about for the first time?
Calendar Reforms Months Years
- 04/13/01:39
- The Calendar System
