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|Millennium:||1st millennium BC|
|374 BC by topic|
|Gregorian calendar||374 BC|
|Ab urbe condita||380|
|Ancient Egypt era||XXX dynasty, 7|
|- Pharaoh||Nectanebo I, 7|
|Ancient Greek era||101st Olympiad, year 3|
|Balinese saka calendar||N/A|
|Chinese calendar||丙午年 (Fire Horse)|
2323 or 2263
— to —
丁未年 (Fire Goat)
2324 or 2264
|Coptic calendar||−657 – −656|
|Ethiopian calendar||−381 – −380|
|- Vikram Samvat||−317 – −316|
|- Shaka Samvat||N/A|
|- Kali Yuga||2727–2728|
|Iranian calendar||995 BP – 994 BP|
|Islamic calendar||1026 BH – 1025 BH|
|Minguo calendar||2285 before ROC|
|Thai solar calendar||169–170|
−247 or −628 or −1400
— to —
−246 or −627 or −1399
Year 374 BC was a year of the pre-Julian Roman calendar. At the time, it was known as the Second year without Tribunate or Consulship (or, less frequently, year 380 Ab urbe condita). The denomination 374 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.
- Athens tries to retire from the Theban-Spartan war and makes peace with Sparta. However, the peace is quickly broken.
- Sparta attacks Corcyra, enlisting Syracusan help. Athens comes to the island's aid. The Athenian general, Timotheus, captures Corcyra and defeats the Spartans at sea off Alyzia (Acarnania).
- The King of Salamis, Evagoras, is assassinated. He is succeeded by his son, Nicocles, who continues his father's liberal Hellenising policy in Cyprus, encouraged by Isocrates, who writes his Exhortation to Nicocles.