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|429 by topic|
|Ab urbe condita||1182|
|Balinese saka calendar||350–351|
|Chinese calendar||戊辰年 (Earth Dragon)|
3125 or 3065
— to —
己巳年 (Earth Snake)
3126 or 3066
|- Vikram Samvat||485–486|
|- Shaka Samvat||350–351|
|- Kali Yuga||3529–3530|
|Iranian calendar||193 BP – 192 BP|
|Islamic calendar||199 BH – 198 BH|
|Minguo calendar||1483 before ROC|
|Seleucid era||740/741 AG|
|Thai solar calendar||971–972|
555 or 174 or −598
— to —
556 or 175 or −597
Year 429 (CDXXIX) was a common year starting on Tuesday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Florentius and Dionysius (or, less frequently, year 1182 Ab urbe condita). The denomination 429 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.
- Spring – The Vandals, led by Genseric ("Caesar King"), invade North Africa. They land with a force of 80,000 men including Alans, and Germanic tribesmen with their families from the Iberian Peninsula, across the narrow Strait of Gibraltar. The Vandal fleet raids the coasts of the Mediterranean Sea, and blockades the grain and oil supply to Italy.
- Genseric seizes lands from the Berbers and destroys church buildings all over Mauretania. He goes on a rampage forcing Bonifacius, Roman governor, to retreat to the fortified coastal town of Hippo Regius (modern Annaba).
- Bonifacius, weakened by the civil war against empress Galla Placidia, sues for peace and is elevated to the rank of supreme commander (magister militum) of Africa.
- Emperor Theodosius II starts to reform the Codex Theodosianus in Constantinople. He establishes a committee to codify all Roman laws. All funds raised by Jews to support schools have to be turned over to the state treasury.
- The Temple of Goddess Athena on the Acropolis of Athens is sacked. Athenian Pagans are persecuted.
- A Gaulish assembly of bishops dispatch Germanus of Auxerre and Lupus of Troyes to Britain to visit the island. To satisfy pope Celestine I they combat the Pelagian heresy.
- Hilary succeeds his kinsman Honoratus and becomes archbishop of Arles.
- Domnus II, future patriarch of Antioch, is ordained as a deacon.