When was the timetable created?
At what time did the calendar initially devised?
In what period did the schedule emerge?
When was the calendar initially devised?
In which period did the calendar firstly thought up?
When was the schedule initially introduced?
During what period was the schedule generation?
During what period was the schedule come about for the first time?
History of calendars Wikipedia
- 04/13/01:39
- Who Invented The Calendar of 365 Days The History of Calendar
