1020s

The 1020s was a decade that began on 1 January 1020, and ended on 31 December 1029. It is distinct from the decade known as the 103rd decade which began on January 1, 1021, and ended on December 31, 1030.

• 1021 – The Moorish taifa (state) of Valencia (in modern Spain) becomes independent, after being ruled by Slavic soldiers for about ten years.
• 1024 – The Salian Dynasty of the Holy Roman Empire is founded by Conrad II.
• 1024 – John XIX succeeds his brother as Pope
• 1027 – On March 26, Pope John XIX crowns Conrad II Holy Roman Emperor.
• 1027 – On May 14, Henri I is crowned king of France at Reims Cathedral.
• 1027 – Aldred becomes abbot of Tavistock.
• 1027 – Start of the Tibetan calendar.
• 1028 – On November 12, dying Emperor Constantine VIII of the Byzantine Empire marries his daughter Zoe of Byzantium to his chosen heir Romanus Argyrus.
• 1028 – On November 15, Romanus Argyrus becomes Eastern Roman Emperor as Romanus III.

• August 28, 1025 – Emperor Go-Reizei of Japan