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|Gregorian calendar||AD 45|
|Ab urbe condita||798|
|Balinese saka calendar||N/A|
|Chinese calendar||甲辰年 (Wood Dragon)|
2741 or 2681
— to —
乙巳年 (Wood Snake)
2742 or 2682
|Coptic calendar||−239 – −238|
|- Vikram Samvat||101���102|
|- Shaka Samvat||N/A|
|- Kali Yuga||3145–3146|
|Iranian calendar||577 BP – 576 BP|
|Islamic calendar||595 BH – 594 BH|
|Julian calendar||AD 45|
|Minguo calendar||1867 before ROC|
|Seleucid era||356/357 AG|
|Thai solar calendar||587–588|
171 or −210 or −982
— to —
172 or −209 or −981
AD 45 (XLV) was a common 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 Vinicius and Corvinus (or, less frequently, year 798 Ab urbe condita). The denomination AD 45 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.
- Marcus Vinicius and Titus Statilius Taurus Corvinus become Roman consuls.
- Galba becomes the commander of Legio III Augusta.
- Salzburg (Juvavum) is awarded the status of a Roman municipium.
- The emperor Claudius expels the Jews from Rome.
- Emperor Claudius founds Savaria, today the Hungarian city of Szombathely.
- The Senate holds consultations regarding real estate speculation in Rome.
- Statius, Latin poet (approximate date) (d. c. AD 96)
- Plutarch, Greek historian/biographer (approximate date) (d. 120)