During what period did the schedule devised?
In what period was the calendar first developed?
At what time was
the calendar come into existence?
At what time was the schedule originally invented?
During what period did the agenda originally thought up?
At what time was the agenda initially introduced?
In what period was the timetable generation?
At what time was the schedule come about for the first time?
When was the current BC
- 04/13/01:39
- Julian calendar Wikipedia
