New reference of the Roman calendar: 1st year of the Era of Diocletian or of the Martyrs (previously the calendar referred to 753 BC: foundation of Rome) still in use among the Copts of Upper Egypt
New reference of the Roman calendar: 1st year of the Era of Diocletian or of the Martyrs (previously the calendar referred to 753 BC: foundation of Rome) still in use among the Copts of Upper Egypt