Year 1 BC was a common year starting on Friday or Saturday (link will display the full calendar) of the Julian calendar (the sources differ, see leap year error for further information) and a leap year starting on Thursday of the Proleptic Julian calendar. It is also a leap year starting on Saturday, in the Proleptic Gregorian calendar. At the time, it was known as the Year of the Consulship of Lentulus and Piso (or, less frequently, year 753 Ab urbe condita). The denomination 1 BC for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years. The following year is 1 AD in the widely used Julian calendar, which does not have a "year zero".Emperor, Ai of Han dies and is succeeded by his cousin Ping of Han, a boy who is nine years old. Wang Mang is appointed regent by the Grand Empress Dowager Wang.
Former regent Dong Xian commits suicide.
Supposed birth of Jesus, in the Christian religion, was conceived 25 March and born on 25 December, as assigned by Dionysius Exiguus in his anno Domini era; according to most scholars, Dionysius used the word "incarnation", but it is not known whether he meant conception or birth. However, at least one scholar thinks Dionysius placed the incarnation of Jesus in the next year, AD 1. Most modern scholars do not consider Dionysius' calculations authoritative, themselves placing the event several years earlier (see Chronology of Jesus).
Dong Xian, a Han dynasty Chinese official under Emperor Ai of Han (b. 23 BC)
Emperor Ai of Han (b. 27 BC)
Empress Zhao Feiyan (b. 32 BC)