This article concerns the period 9 BC – 1 BC, the last nine years of the 1st century BC. Note that there is no year zero (0) in either the proleptic Gregorian calendar or Julian calendar. Hence 1 BC is followed by the year AD 1.
AD 1 is the first year of the Anno Domini era and of the Common Era. In 525 (the consulship of Probus Junior [Flavius Probus]), a Christian monk...
