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

Politics
405 BC by topic
State leaders Political entities
Categories
Deaths
v t e

405 BC in various calendars
Gregorian calendar	405 BC CDV BC
Ab urbe condita	349
Ancient Egypt era	XXVII dynasty, 121
- Pharaoh	Darius II of Persia, 19
Ancient Greek era	93rd Olympiad, year 4
Assyrian calendar	4346
Balinese saka calendar	N/A
Bengali calendar	−997
Berber calendar	546
Buddhist calendar	140
Burmese calendar	−1042
Byzantine calendar	5104–5105
Chinese calendar	乙亥年 (Wood Pig) 2293 or 2086 — to — 丙子年 (Fire Rat) 2294 or 2087
Coptic calendar	−688 – −687
Discordian calendar	762
Ethiopian calendar	−412 – −411
Hebrew calendar	3356–3357
Hindu calendars
- Vikram Samvat	−348 – −347
- Shaka Samvat	N/A
- Kali Yuga	2696–2697
Holocene calendar	9596
Iranian calendar	1026 BP – 1025 BP
Islamic calendar	1058 BH – 1057 BH
Javanese calendar	N/A
Julian calendar	N/A
Korean calendar	1929
Minguo calendar	2316 before ROC 民前2316年
Nanakshahi calendar	−1872
Thai solar calendar	138–139
Tibetan calendar	阴木猪年 (female Wood-Pig) −278 or −659 or −1431 — to — 阳火鼠年 (male Fire-Rat) −277 or −658 or −1430

Year 405 BC was a year of the pre-Julian Roman calendar. At the time, it was known as the Year of the Tribunate of Barbatus, Capitolinus, Cincinnatus, Medullinus, Iullus and Mamercinus (or, less frequently, year 349 Ab urbe condita). The denomination 405 BC 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

Greece

After their victory in the Battle of Arginusae over the Spartans, the Athenian fleet follows the reappointed Spartan admiral, Lysander, to the Hellespont. The Athenian fleet under Admiral Conon is destroyed by the Spartans under Lysander in the Battle of Aegospotami in the Sea of Marmara and Conon flees to Cyprus.
The Spartan king Pausanias lays siege to Athens while Lysander's fleet blockades Piraeus. This action closes the grain route through the Hellespont, thereby starving Athens.
While the Peloponnesians besiege Athens, Theramenes tries to negotiate with Lysander. He is away for three months while Athens is being reduced to starvation. Then he heads the embassy that negotiates the terms of capitulation to the Spartans.

Sicily

Dionysius the Elder rises to power as the tyrant of Syracuse. He makes peace with the Carthaginian general, Himilco (whose army has been weakened by the plague), and fortifies Syracuse. This treaty leaves Carthage in control of most of Sicily.
Dionysius the Elder ruthlessly consolidates and expands his power. He builds a wall around Syracuse and fortifies Epipolae. The Greek citizens of Naxos, Catana, and Leontini are removed from their cities; many of them are enslaved and their homes are given to Sicilian and Italian mercenaries. Dionysius prepares his army to fight against Carthage, which now occupies western and southern Sicily.

By topic

Drama

January – Aristophanes' play The Frogs is performed.^[1]
March/April – Euripides' The Bacchae and Iphigeneia at Aulis are performed posthumously as part of a tetralogy at the City Dionysia festival and win first prize.

Art

The Erechtheum, which includes The Porch of Maidens (Caryatid Porch), is completed in the Ionian style on the Acropolis in Athens after 16 years of construction.

Births

Deaths

Philolaus, Greek mathematician and philosopher (approximate date) (b. c. 480 BC)