Year 1 (I) was a common year starting on Saturday of the Julian calendar.

The preceding year is 1 BC in the widely used Gregorian calendar or in its predecessor, the Julian calendar, neither of which has a "year zero".__NOTOC__

Roman Empire

• Tiberius, under order of Augustus, quells revolts in Germania (1–5).
• Gaius Caesar and Lucius Aemilius Paullus are appointed consuls.
• Gaius Caesar marries Livilla, daughter of Antonia Minor and Nero Claudius Drusus, in an effort to gain prestige.
• Quirinius becomes a chief advisor to Gaius in Armenia. Gnaeus Domitius Ahenobarbus whose father Lucius Domitius Ahenobarbus had served as consul in 16 BC also serves in the Armenia campaigns.
• The Aqua Alsienta aqueduct is constructed.
• Silk appears in Rome.
• Areius Paianeius becomes Archon of Athens.

Asia

• Start of the Yuanshi era of the Chinese Han Dynasty.
• Confucius is given his first royal title (posthumous name) of Lord Baochengxun Ni.
• Emperor Ping of Han China begins his reign and Wang Mang is re-instated as regent by Grand Empress Dowager Wang.
• Former regent Dong Xian commits suicide.
• Sapadbizes, Yuezhi prince and King of Kush (Bactria), dies. Heraios succeeds him as king.

Africa

• Kingdom of Aksum, centered in modern day Ethiopia and Eritrea, is founded (approximate date).
• Amanishakheto Queen of Kush (Nubia) dies. Her son, Natakamani, becomes King of Kush.

Americas

• Moxos ceases to be a significant religious area in South America (approximate date).

Arts and Sciences

• The poem Metamorphoses is written by Ovid.
• Livy writes his monumental History of Rome (Ab Urbe Condita).

Religion

• Birth of Jesus, as assigned by Dionysius Exiguus in his anno Domini era according to at least one scholar.Georges Declercq, Anno Domini: The origins of the Christian Era (Turnhout, Belgium: Brepols, 2000), pp.143–147.G. Declercq, "Dionysius Exiguus and the introduction of the Christian Era", Sacris Erudiri 41 (2002) 165–246, pp.242–246. Annotated version of a portion of Anno Domini. However, most scholars think Dionysius placed the birth of Jesus in the previous year, 1 BC. Despite this, most modern scholars do not consider Dionysius' calculations authoritative, placing the event several years earlier (see Chronology of Jesus).
• Buddhism is introduced into China.