|AD 33 by topic|
|Gregorian calendar||AD 33|
|Ab urbe condita||786|
|Balinese saka calendar||N/A|
|Chinese calendar||壬辰年 (Water Dragon)|
2729 or 2669
— to —
癸巳年 (Water Snake)
2730 or 2670
|Coptic calendar||−251 – −250|
|- Vikram Samvat||89–90|
|- Shaka Samvat||N/A|
|- Kali Yuga||3133–3134|
|Iranian calendar||589 BP – 588 BP|
|Islamic calendar||607 BH – 606 BH|
|Julian calendar||AD 33|
|Minguo calendar||1879 before ROC|
|Seleucid era||344/345 AG|
|Thai solar calendar||575–576|
159 or −222 or −994
— to —
160 or −221 or −993
AD 33 (XXXIII) was a common year starting on Thursday (link will display the full calendar) of the Julian calendar. At the time, it was known in the Roman world as the Year of the Consulship of Ocella and Sulla (or, less frequently, year 786 Ab urbe condita). The denomination AD 33 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in the world for naming years.
- Servius Sulpicius Galba is a Roman Consul.
- Emperor Tiberius founds a credit bank in Rome.
- A financial crisis hits Rome, due to poorly chosen fiscal policies. Land values plummet, and credit is increased. These actions lead to a lack of money, a crisis of confidence, and much land speculation. The primary victims are senators, knights and the wealthy. Many aristocratic families are ruined.
- Although the usurpation of Wang Mang and the Chimei Rebellion are behind him, Emperor Guangwu now faces a new threat to the Han Dynasty: the Rebellion of Gongsun Shu in the Sichuan province. Gongsun's naval forces are unsuccessful against Han General Cen Peng, so Gongsun decides to fortify his position by blockading the entire Yangtze River with a large floating pontoon bridge, complete with floating fortified posts. He erects forts on both banks of the river for further missile fire and protects his barrier with a large boom. After Cen Peng is unable to break through, he constructs several "castle ships" with high ramparts and ramming vessels known as "colliding swoopers", which break through Gongsun's lines and allow Cen to quell his rebellion. Gongsun Shu is totally defeated three years later.
- Gaius Rubellius Plautus, son of Gaius Rubellius Blandus and Julia Livia (granddaughter of the reigning Roman Emperor Tiberius) (d. AD 62)
- October 17 – Agrippina the Elder, wife of Germanicus (suicide by starvation) (born 14 BC)
- Drusus Caesar, son of Germanicus and Agrippina the Elder, adoptive son of Tiberius (starvation) (born AD 7)
- Gaius Asinius Gallus, widower of Vipsania Agrippina and alleged lover of Agrippina the elder (starvation)
- April 3 – Jesus of Nazareth, (possible date of the crucifixion) (born circa 4 BC) The other possible date supported by a number of scholars is April 7, AD 30.
- Marcus Aemilius Lepidus, senator, consul in AD 6, father-in-law of Drusus Caesar (natural causes) (born circa 30 BC)
- Bunson, Matthew (2002). Encyclopedia of the Roman Empire (2nd ed.). Infobase Publishing. p. 226. ISBN 978-0-8160-4562-4.
- Harris, W. V. (2011). Rome's Imperial Economy: Twelve Essays. Oxford University Press. p. 238. ISBN 978-0-19-959516-7.
- Salisbury, Joyce E. (2001). Encyclopedia of women in the ancient world. ABC-CLIO. p. 3. ISBN 978-1-57607-092-5.
- Fantham, Elaine (2006). Julia Augusti: The Emperor's Daughter. Taylor & Francis. p. 122. ISBN 978-0-415-33145-6.
- Bunson, Matthew (2002). Encyclopedia of the Roman Empire (2nd ed.). Infobase Publishing. p. 50. ISBN 978-0-8160-4562-4.
- Colin J. Humphreys and W. G. Waddington, "Dating the Crucifixion ," Nature 306 (December 22/29, 1983), pp. 743-46. 
- Maier, P.L. (1968). "Sejanus, Pilate, and the Date of the Crucifixion". Church History. 37 (1): 3–13. doi:10.2307/3163182. JSTOR 3163182.
- Fotheringham, J.K. (1934). "The evidence of astronomy and technical chronology for the date of the crucifixion". Journal of Theological Studies. 35 (138): 146–162. doi:10.1093/jts/os-XXXV.138.146.
- Blinzler, J. Der Prozess Jesu, fourth edition, Regensburg, Pustet, 1969, pp101-126
- Rainer Riesner, Paul's Early Period: Chronology, Mission Strategy, Theology (Wm. B. Eerdmans Publishing, 1998), page 58.
- Hazel, John (2002). Who's who in the Roman world (2nd ed.). Routledge. p. 166. ISBN 978-0-415-29162-0.