|Centuries:||1st century BC – 1st century – 2nd century|
|Decades:||10s BC 0s BC 0s – 10s – 20s 30s 40s|
|Years:||9 AD 10 AD 11 AD – 12 AD – 13 AD 14 AD 15 AD|
|12 by topic|
|State leaders – Sovereign states|
|Birth and death categories|
|Births – Deaths|
|Establishment and disestablishment categories|
|Establishments – Disestablishments|
|Ab urbe condita||765|
|English Regnal year||N/A|
— to —壬申年十二月廿九日
|- Vikram Samvat||68–69|
|- Shaka Samvat||N/A|
|- Kali Yuga||3113–3114|
|- Ǹrí Ìgbò||-988–-987|
|Iranian calendar||610 BP – 609 BP|
|Islamic calendar||629 BH – 628 BH|
|Juche calendar||N/A (before 1912)|
|Julian calendar||12 XII|
|Minguo calendar||1900 before ROC
|Thai solar calendar||555|
|Wikimedia Commons has media related to: 12|
Year 12 (XII) was a leap year starting on Friday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Caesar and Capito (or, less frequently, year 765 Ab urbe condita). The denomination 12 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.
By place 
Roman Empire 
- Annius Rufus is appointed Prefect of Judea.
- Augustus orders a major invasion of Germany beyond the Rhine.
- Germanicus and Gaius Fonteius Capito become Roman Consuls.
- Quirinius returns from Judea to become a counselor to Tiberius.
- The Armenian Artaxiad Dynasty is overthrown by the Romans.
By topic 
Arts and sciences 
- Ovid stops writing Fasti because of the lack of resources (being far from the libraries of Rome). He completes 6 books that detail festivals found in the Roman Calendar.