423

Millennium:	1st millennium
Centuries:	4th century 5th century 6th century
Decades:	400s 410s 420s 430s 440s
Years:	420 421 422 423 424 425 426

423 in variouscalendars

Gregorian calendar	423 CDXXIII
Ab urbe condita	1176
Assyrian calendar	5173
Balinese saka calendar	344–345
Bengali calendar	−170
Berber calendar	1373
Buddhist calendar	967
Burmese calendar	−215
Byzantine calendar	5931–5932
Chinese calendar	Nhâm tuấtNiên (WaterDog) 3120 or 2913 — to — Quý hợi niên (WaterPig) 3121 or 2914
Coptic calendar	139–140
Discordian calendar	1589
Ethiopian calendar	415–416
Hebrew calendar	4183–4184
Hindu calendars
-Vikram Samvat	479–480
-Shaka Samvat	344–345
-Kali Yuga	3523–3524
Holocene calendar	10423
Iranian calendar	199 BP – 198 BP
Islamic calendar	205 BH – 204 BH
Javanese calendar	307–308
Julian calendar	423 CDXXIII
Korean calendar	2756
Minguo calendar	1489 beforeROC Dân tiền 1489 niên
Nanakshahi calendar	−1045
Seleucid era	734/735AG
Thai solar calendar	965–966
Tibetan calendar	Dương thủy cẩu niên (male Water-Dog) 549 or 168 or −604 — to — Âm thủy trư niên (female Water-Pig) 550 or 169 or −603

The favorites of EmperorHonorius,byJohn William Waterhouse(1883)

Year423(CDXXIII) was acommon year starting on Monday(link will display the full calendar) of theJulian calendar.At the time, it was known as theYear of the Consulship ofMarinianusandAsclepiodotus(or, less frequently,year 1176Ab urbe condita). The denomination 423 for this year has been used since the early medieval period, when theAnno Dominicalendar erabecame the prevalent method in Europe for naming years.

Events

By place

Roman Empire

• August 15– EmperorHonorius,age 38, dies atRavennaofdropsy,perhapspulmonary edema.With no children to claim the throne,Joannes,primicerius notariorum( "chief notary", head of thecivil service), seizes the throne of theWestern Roman Empire,and is declared emperor. Among his supporters areFlavius Aetius,Roman general (magister militum). Joannes' rule is accepted in thediocesesofGaul,HispaniaandItalia,but not inAfrica.
• Winter – EmperorTheodosius IIrefuses to recognize Joannes as emperor, and prepares forwar.He mobilizes an expeditionary force under command ofArdaburius,and his sonFlavius Aspar.

By topic

Religion

• TheodoretbecomesbishopofCyrrhus(Syria). He converts more than 1,000Marcionitesin his diocese.

Births

• Theodosius the Cenobiarch,monkand founder of theMonastery of St. Theodosius(approximate date)

Deaths

• August 15–Honorius,Roman Emperor(b.384)
• December 23–Ming Yuan Di,ruler of theXianbeistateNorthern Wei(b.392)
• Eulalius,antipopeofRome
• Tufa,Chinese princess and wife ofQifu Chipan
• Xiao Wenshou,empress dowagerof theLiu Song dynasty(b.343)