Year 432 (CDXXXII) 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 Aetius and Valerius (or, less frequently, year 1185 Ab urbe condita). The denomination 432 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.
|Ab urbe condita||1185|
|Balinese saka calendar||353–354|
|Chinese calendar||辛未年 (Metal Goat)|
3128 or 3068
— to —
壬申年 (Water Monkey)
3129 or 3069
|- Vikram Samvat||488–489|
|- Shaka Samvat||353–354|
|- Kali Yuga||3532–3533|
|Iranian calendar||190 BP – 189 BP|
|Islamic calendar||196 BH – 195 BH|
|Minguo calendar||1480 before ROC|
|Seleucid era||743/744 AG|
|Thai solar calendar||974–975|
558 or 177 or −595
— to —
559 or 178 or −594
- Battle of Rimini: Roman forces under command of Flavius Aetius are defeated near Rimini (Italy). His rival comes Bonifacius is mortally wounded and dies several days later. Aetius flees to Dalmatia and seeks refuge with the Huns.
- Sebastianus, son-in-law of Bonifacius, becomes supreme commander (magister militum) of the Western Roman army. Empress Galla Placidia gives him considerable influence over imperial policy.
- The Huns are united by King Rugila (also called Rua) on the Hungarian Plain. He exacts annual peace payments from the Eastern Roman Empire.
- The Basilica of Saint Sabina at the Aventine (Rome) is finished by Priest Petrus of Illyria.
- Assembly begins on The Parting of Lot and Abraham, a mosaic in the nave arcade of the Basilica of Santa Maria Maggiore.
- July 27 – Pope Celestine I dies after a 10-year reign in which he led a vigorous policy against Nestorianism. He is succeeded by Sixtus III as the 44th pope.
- Saint Patrick, Roman Britain-born missionary, is consecrated a bishop and converts the Irish to Christianity until his death around 460.
- December 25 – Christmas is celebrated for the first time in Alexandria (approximate date).
- Moninne, one of Ireland's early women saints