Dating system before bc ad
It was often used in a more elaborate form such as Anno Nostrae Salutis (meaning: "in the year of our salvation"), Anno Salutis Humanae (meaning: "in the year of the salvation of men"), or Anno Reparatae Salutis (meaning: "in the year of accomplished salvation"). This creates a problem with some scientific calculations.
The calendar era which it numbers is based on the traditionally reckoned year of the conception or birth of Jesus. C., is used in the English language to denote years before the start of this epoch.Although the last non-imperial consul, Basilius, was appointed in 541 by Emperor Justinian I, later emperors through Constans II (641–668) were appointed consuls on the first January 1 after their accession.All of these emperors, except Justinian, used imperial postconsular years for all of the years of their reign alongside their regnal years.Byzantine chroniclers like Maximus the Confessor, George Syncellus and Theophanes dated their years from Annianus' Creation of the World.This era, called Anno Mundi, "year of the world" (abbreviated AM), by modern scholars, began its first year on 25 March 5492 BC. The first historian or chronicler to use Anno Domini as his primary dating mechanism was Victor of Tonnenna, an African chronicler of the 6th century.