Centuries:	9th century - 10th century - 11th century
Decades:	960s  970s  980s  - 990s -  1000s  1010s  1020s
Years:	988 989 990 - 991 - 992 993 994

991 by topic v • d • e

Politics

State leaders - Sovereign states

Birth and death categories

Births - Deaths

Establishment and disestablishment categories

Establishments - Disestablishments

991 in other calendars

Gregorian calendar	991 CMXCI
Ab urbe condita	1744
Armenian calendar	440 ԹՎ ՆԽ
Bahá'í calendar	-853 – -852
Berber calendar	1941
Buddhist calendar	1535
Burmese calendar	353
Byzantine calendar	6499 – 6500
Chinese calendar	庚寅年十二月十三日 (3627/3687-12-13) — to — 辛卯年十一月廿三日 (3628/3688-11-23)
Coptic calendar	707 – 708
Ethiopian calendar	983 – 984
Hebrew calendar	4751 – 4752
Hindu calendars
- Vikram Samvat	1046 – 1047
- Shaka Samvat	913 – 914
- Kali Yuga	4092 – 4093
Holocene calendar	10991
Iranian calendar	369 – 370
Islamic calendar	380 – 381
Japanese calendar
Korean calendar	3324
Thai solar calendar	1534
v • d • e

This article documents the year AD 991.

Events

By Place

Europe

• Battle of Maldon: The Anglo-Saxons are defeated by Viking invaders lead by Olaf Tryggvason, later Olaf I of Norway.
• Sweyn I of Denmark recovers his throne.

Births

• Sigurd Hlodvirsson, Earl of Orkney

Deaths

• Theophanu, empress, mother of Otto III (b. 956)
• Emperor En'yū, emperor of Japan (b. 959)