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405 in various calendars
Gregorian calendar	405; CDV
Ab urbe condita	1158
Assyrian calendar	5155
Balinese saka calendar	326–327
Bengali calendar	−188
Berber calendar	1355
Buddhist calendar	949
Burmese calendar	−233
Byzantine calendar	5913–5914
Chinese calendar	甲辰年 (Wood Dragon); 3102 or 2895; — to —; 乙巳年 (Wood Snake); 3103 or 2896
Coptic calendar	121–122
Discordian calendar	1571
Ethiopian calendar	397–398
Hebrew calendar	4165–4166
Hindu calendars
- Vikram Samvat	461–462
- Shaka Samvat	326–327
- Kali Yuga	3505–3506
Holocene calendar	10405
Iranian calendar	217 BP – 216 BP
Islamic calendar	224 BH – 223 BH
Javanese calendar	288–289
Julian calendar	405; CDV
Korean calendar	2738
Minguo calendar	1507 before ROC; 民前1507年
Nanakshahi calendar	−1063
Seleucid era	716/717 AG
Thai solar calendar	947–948
Tibetan calendar	阳木龙年; (male Wood-Dragon); 531 or 150 or −622; — to —; 阴木蛇年; (female Wood-Snake); 532 or 151 or −621

Millennium:	1st millennium
Centuries:	4th century; 5th century ; 6th century;
Decades:	380s; 390s; 400s ; 410s; 420s;
Years:	402; 403; 404; 405 ; 406; 407; 408;

Year 405 (CDV) 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 Stilicho and Anthemius (or, less frequently, year 1158 Ab urbe condita). The denomination 405 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.

Events

By place

Roman Empire

Emperor Honorius closes the Flavian Amphitheatre (Colosseum), in an austerity move that abolishes amusements.^{[citation needed]}
Stilicho, Roman general (magister militum), orders the Sibylline Books to be burned, according to the Roman poet Rutilius Claudius Namatianus.
Stilicho crushes a coalition of Asding Vandals, Ostrogoths and Quadi with an army raised from forces of the Rhine frontier, leaving this sector dangerously weakened.^{[citation needed]}
War of Radagaisus: King Radagaisus leads an invasion with a force of 20,000 men and crosses the Alps. He spends the winter in the Po Valley and is observed by Stilicho, who lacks sufficient strength to prepare an offensive against the invading German tribes. The exact numbers of the migration are unknown, probably nearly 100,000, including Alans, Burgundians, Goths, Vandals, and other smaller tribes.
Flavius Aetius is sent as a child hostage at the court of Alaric I, king of the Visigoths.^{[citation needed]}

Asia

The Khitan are first mentioned in Chinese chronicles. They wander along the boundaries of Kara-muren, and form part of the Donghu (Tong-hou) confederation.
Jeonji becomes king of the Korean kingdom of Baekje.^[1]

By topic

Arts and Sciences

The Armenian alphabet is devised by Mesrop Mashtots.
The Japanese court officially adopts the Chinese writing system (approximate date).
Theon of Alexandria, Greek mathematician, dies at age 70 (approximate), having been helped in his work by his daughter Hypatia.