In which period did the timetable originated?
At what time was the timetable first developed?
In which period was the timetable come into existence?
When was the schedule initially created?
In which period was the calendar originally imagined?
At what time did the calendar firstly established?
At what time was the timetable creation?
During what period was the calendar emerge for the first time?
Who Invented The Calendar of 365 Days The History of Calendar
