940

Millennium:	1st millennium
Centuries:	9th century – 10th century – 11th century
Decades:	910s  920s  930s  – 940s –  950s  960s  970s
Years:	937 938 939 – 940 – 941 942 943

940 Media

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  West Slavs during the 9th–10th centuries.

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  Siemomysł, duke of the Piast Dynasty.

940 (CMXL) was a leap year starting on Wednesday of the Julian calendar, the 940th year of the Common Era (CE) and Anno Domini (AD) designations, the 940th year of the 1st millennium, the 40th year of the 10th century, and the 1st year of the 940s decade. As of the start of 940, the Gregorian calendar was 5 days ahead of the Julian calendar, which was the dominant calendar of the time.

Events

• Saadia Gaon makes his siddur (Jewish prayer book) in Iraq.
• Narita-san Temple is founded in Chiba, Japan.
• The Liao Dynasty stops the rule that a younger sister replace an older sister who died in marriage.

Births

• Abu'l-Wafa, Iranian mathematician
• Brian Boru, high king of Ireland

Deaths

• July 20 – Ibn Muqla, Abbasid vizier and calligrapher
• December 25 – Makan ibn Kaki, Dailamite warlord
• Taira no Masakado, leader of the Taira Clan