|418 by topic|
|Ab urbe condita||1171|
|Balinese saka calendar||339–340|
|Chinese calendar||丁巳年 (Fire Snake)
3114 or 3054
— to —
戊午年 (Earth Horse)
3115 or 3055
|- Vikram Samvat||474–475|
|- Shaka Samvat||339–340|
|- Kali Yuga||3518–3519|
|Iranian calendar||204 BP – 203 BP|
|Islamic calendar||210 BH – 209 BH|
|Minguo calendar||1494 before ROC
|Seleucid era||729/730 AG|
|Thai solar calendar||960–961|
544 or 163 or −609
— to —
545 or 164 or −608
|Wikimedia Commons has media related to 418.|
Year 418 (CDXVIII) 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 Honorius and Theodosius (or, less frequently, year 1171 Ab urbe condita). The denomination 418 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.
- Emperor Honorius bribes Wallia, king of the Visigoths, into regaining Hispania for the Roman Empire. His victory over the Vandals in 416 forces him to retire to Andalusia. The Visigothic territory in Gaul now extends from the Garonne to the Loire, and becomes known as the Visigothic Kingdom.
- Theodoric I becomes king of the Visigoths. He complete the settlements in Gallia Aquitania and expands his military power to the south.
- In this year the Romans collect all the treasures which were in Britain, and hide some of them in the earth so that no one afterwards can find them, and some they take with them into Gaul.
- December 28 – Pope Boniface I succeeds Zosimus as the 42nd pope.
- Eulalius is elected antipope of Rome. He claims in a letter to Honorius his recognition as pope.