1668

1668 in various calendars
Gregorian calendar	1668; MDCLXVIII
Ab urbe condita	2421
Armenian calendar	1117; ԹՎ ՌՃԺԷ
Assyrian calendar	6418
Balinese saka calendar	1589–1590
Bengali calendar	1075
Berber calendar	2618
English Regnal year	19 Cha. 2 – 20 Cha. 2
Buddhist calendar	2212
Burmese calendar	1030
Byzantine calendar	7176–7177
Chinese calendar	丁未年 (Fire Goat); 4365 or 4158; — to —; 戊申年 (Earth Monkey); 4366 or 4159
Coptic calendar	1384–1385
Discordian calendar	2834
Ethiopian calendar	1660–1661
Hebrew calendar	5428–5429
Hindu calendars
- Vikram Samvat	1724–1725
- Shaka Samvat	1589–1590
- Kali Yuga	4768–4769
Holocene calendar	11668
Igbo calendar	668–669
Iranian calendar	1046–1047
Islamic calendar	1078–1079
Japanese calendar	Kanbun 8; (寛文８年)
Javanese calendar	1590–1591
Julian calendar	Gregorian minus 10 days
Korean calendar	4001
Minguo calendar	244 before ROC; 民前244年
Nanakshahi calendar	200
Thai solar calendar	2210–2211
Tibetan calendar	阴火羊年; (female Fire-Goat); 1794 or 1413 or 641; — to —; 阳土猴年; (male Earth-Monkey); 1795 or 1414 or 642

Millennium:	2nd millennium
Centuries:	16th century; 17th century ; 18th century;
Decades:	1640s; 1650s; 1660s ; 1670s; 1680s;
Years:	1665; 1666; 1667; 1668 ; 1669; 1670; 1671;

Events of 1668

January - The Triple Alliance of 1668 is formed between England, Sweden and the United Provinces.
February 13 - In Lisbon, a peace treaty is established between Afonso VI of Portugal and Carlos II of Spain, by mediation of Charles II of England, where the legitimacy of the Portuguese monarch is recognized. Portugal yields Ceuta to Spain.
May 2 - The first Treaty of Aix-la-Chapelle ends the War of Devolution.

Mid-July - Henry Morgan sacks Portobello, taking a lot of treasure.
Mid-July - Henry Morgan sacks Panama City, but very little money is seized and the city is burned.

Bishop Isaac Barrow founds the Bishop Barrow Trust to establish a university on the Isle of Man (King William's College).
Molière's comedy, L'Avare, is first performed.
The British East India Company takes over Bombay.
The first National Bank in Europe (the Riksbank) is founded in Stockholm, Sweden.
Emperor Yohannes I of Ethiopia convenes a church council in Gondar, which decides to expel all Roman Catholics in Ethiopia.