AD 97 (XCVII) was a common year starting on Sunday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Augustus and Rufus (or, less frequently, year 850 Ab urbe condita). The denomination AD 97 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.
|Gregorian calendar||AD 97|
|Ab urbe condita||850|
|Balinese saka calendar||18–19|
|Chinese calendar||丙申年 (Fire Monkey)|
2793 or 2733
— to —
丁酉年 (Fire Rooster)
2794 or 2734
|Coptic calendar||−187 – −186|
|- Vikram Samvat||153–154|
|- Shaka Samvat||18–19|
|- Kali Yuga||3197–3198|
|Iranian calendar||525 BP – 524 BP|
|Islamic calendar||541 BH – 540 BH|
|Julian calendar||AD 97|
|Minguo calendar||1815 before ROC|
|Seleucid era||408/409 AG|
|Thai solar calendar||639–640|
223 or −158 or −930
— to —
224 or −157 or −929
- October 28 – Emperor Nerva recalls his general Marcus Ulpius Trajanus, age 44, from the German frontier and is forced by the Praetorian Guard to adopt him as his successor.
- Tacitus advances to consulship.
- The Roman colony of Cuicul is started in Numidia.
- Gloucester, England is founded as Colonia Glevum Nervensis by the Romans.
- Nerva recognizes the Sanhedrin of Jamnia as an official governmental body of the Jews, and the patriarch or nasi is designated as the representative of the Jewish people in Rome.
- Sextus Julius Frontinus is appointed superintendent of the aqueducts (curator aquarum) in Rome. At least 10 aqueducts supply the city with 250 million US gallons (950,000 m3) of water per day. The public baths use half the supply.
- Chinese general Ban Chao orders his lieutenant, Gan Ying, to establish regular relations with the Parthians.