In what period did the timetable invented?
When did the agenda first introduced?
At what time did the timetable come into existence?
At what time did the calendar originally created?
During what period did the agenda firstly thought up?
In what period did the agenda firstly devised?
In which period did the calendar creation?
When did the agenda emerge for the first time?
Who Invented The Calendar of 365 Days The History of Calendar
