340 BC

340 BC in various calendars
Gregorian calendar	340 BC; CCCXL BC
Ab urbe condita	414
Ancient Egypt era	XXXI dynasty, 4
- Pharaoh	Artaxerxes III of Persia, 4
Ancient Greek era	110th Olympiad (victor)¹
Assyrian calendar	4411
Balinese saka calendar	N/A
Bengali calendar	−932
Berber calendar	611
Buddhist calendar	205
Burmese calendar	−977
Byzantine calendar	5169–5170
Chinese calendar	庚辰年 (Metal Dragon); 2358 or 2151; — to —; 辛巳年 (Metal Snake); 2359 or 2152
Coptic calendar	−623 – −622
Discordian calendar	827
Ethiopian calendar	−347 – −346
Hebrew calendar	3421–3422
Hindu calendars
- Vikram Samvat	−283 – −282
- Shaka Samvat	N/A
- Kali Yuga	2761–2762
Holocene calendar	9661
Iranian calendar	961 BP – 960 BP
Islamic calendar	991 BH – 990 BH
Javanese calendar	N/A
Julian calendar	N/A
Korean calendar	1994
Minguo calendar	2251 before ROC; 民前2251年
Nanakshahi calendar	−1807
Thai solar calendar	203–204
Tibetan calendar	阳金龙年; (male Iron-Dragon); −213 or −594 or −1366; — to —; 阴金蛇年; (female Iron-Snake); −212 or −593 or −1365

Millennium:	1st millennium BC
Centuries:	5th century BC; 4th century BC ; 3rd century BC;
Decades:	360s BC; 350s BC; 340s BC ; 330s BC; 320s BC;
Years:	343 BC; 342 BC; 341 BC; 340 BC ; 339 BC; 338 BC; 337 BC;

Year 340 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Torquatus and Mus (or, less frequently, year 414 Ab urbe condita). The denomination 340 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.

Gregorian calendar	340 BC CCCXL BC
Ab urbe condita	414
Ancient Egypt era	XXXI dynasty, 4
- Pharaoh	Artaxerxes III of Persia, 4
Ancient Greek era	110th Olympiad (victor )¹
Assyrian calendar	4411
Balinese saka calendar	N/A
Bengali calendar	−932
Berber calendar	611
Buddhist calendar	205
Burmese calendar	−977
Byzantine calendar	5169–5170
Chinese calendar	庚辰年 (Metal Dragon) 2358 or 2151 — to — 辛巳年 (Metal Snake) 2359 or 2152
Coptic calendar	−623 – −622
Discordian calendar	827
Ethiopian calendar	−347 – −346
Hebrew calendar	3421–3422
Hindu calendars
- Vikram Samvat	−283 – −282
- Shaka Samvat	N/A
- Kali Yuga	2761–2762
Holocene calendar	9661
Iranian calendar	961 BP – 960 BP
Islamic calendar	991 BH – 990 BH
Javanese calendar	N/A
Julian calendar	N/A
Korean calendar	1994
Minguo calendar	2251 before ROC 民前2251年
Nanakshahi calendar	−1807
Thai solar calendar	203–204
Tibetan calendar	阳金龙年 (male Iron-Dragon) −213 or −594 or −1366 — to — 阴金蛇年 (female Iron-Snake) −212 or −593 or −1365