690

690 in various calendars
Gregorian calendar	690; DCXC
Ab urbe condita	1443
Armenian calendar	139; ԹՎ ՃԼԹ
Assyrian calendar	5440
Balinese saka calendar	611–612
Bengali calendar	97
Berber calendar	1640
Buddhist calendar	1234
Burmese calendar	52
Byzantine calendar	6198–6199
Chinese calendar	己丑年 (Earth Ox); 3387 or 3180; — to —; 庚寅年 (Metal Tiger); 3388 or 3181
Coptic calendar	406–407
Discordian calendar	1856
Ethiopian calendar	682–683
Hebrew calendar	4450–4451
Hindu calendars
- Vikram Samvat	746–747
- Shaka Samvat	611–612
- Kali Yuga	3790–3791
Holocene calendar	10690
Iranian calendar	68–69
Islamic calendar	70–71
Japanese calendar	Shuchō 5; (朱鳥５年)
Javanese calendar	582–583
Julian calendar	690; DCXC
Korean calendar	3023
Minguo calendar	1222 before ROC; 民前1222年
Nanakshahi calendar	−778
Seleucid era	1001/1002 AG
Thai solar calendar	1232–1233
Tibetan calendar	阴土牛年; (female Earth-Ox); 816 or 435 or −337; — to —; 阳金虎年; (male Iron-Tiger); 817 or 436 or −336

Millennium:	1st millennium
Centuries:	6th century; 7th century ; 8th century;
Decades:	670s; 680s; 690s ; 700s; 710s;
Years:	687; 688; 689; 690 ; 691; 692; 693;

Year 690 (DCXC) was a common year starting on Saturday (link will display the full calendar) of the Julian calendar. The denomination 690 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

King Oswine of Kent is toppled by Wihtred, brother of the late king Eadric of Kent, after a 2-year reign. He takes his lands north of the River Thames, in revenge against the East Saxons (approximate date).

October 16 – Wu Zetian ascends to the throne of the Tang dynasty, and proclaims herself ruler of the Chinese Empire as "Holy and Divine Emperor". She becomes the first and only female "emperor" in 5,000 years of Chinese history. Wu Zetian changes the dynasty's name to the Zhou dynasty, and begins to murder throne pretendants and ministers who try to oppose her. During her reign she elevates the status of Buddhism above Taoism.

The approximate date of the earliest known blindfold chess, played by Sa'id ibn Jubayr^[1]

Willibrord, Anglo-Saxon missionary, travels from York with 12 Benedictine monks to Westkapelle, (modern Netherlands) to Christianize the pagan Frisians.
September 19 – Theodore of Tarsus, age 88, dies at Canterbury. He is succeeded by Berhtwald as the 9th Archbishop of Canterbury (approximate date).