On This Day

Persian polymath Omar Khayyam completes the Jalali calendar, a solar calendar with a precise 33-year intercalation cycle

Persian polymath Omar Khayyam completes the Jalali calendar, a solar calendar with a precise 33-year intercalation cycle and the basis for the Persian calendar still in use today

Persian polymath Omar Khayyam completes the Jalali calendar, a solar calendar with a precise 33-year intercalation cycle and the basis for the Persian calendar still in use today

Events Before

  1. Battle of Montesarchio: Prince of Benevento, Pandulf IV killed battling the encroaching Normans in southern Italy

    Battle of Montesarchio: Prince of Benevento, Pandulf IV killed battling the encroaching Normans in southern Italy

  2. Dmitar Zvonimir is crowned king of Croatia

    Demetrius Zvonimir (Croatian: Dmitar Zvonimir, pronounced [dmîtar zʋônimiːr]; Old Church Slavic: ⰸⱏⰲⱏⱀⰻⰿⰻⱃⱏ; died 1089) was a King of Croatia and Dalmatia from 1075 or 1076 until his death in 1089.

  3. Pope Gregory VII excommunicates Holy Roman Emperor Henry IV for the first time

    Henry IV (German: Heinrich IV; 11 November 1050 – 7 August 1106) was Holy Roman Emperor from 1084 to 1105, King of Germany from 1054 to 1105, and King of Italy and Burgundy from 1056 to 1105.

  4. The first Parliament of Friuli is created

    The first Parliament of Friuli is created

  5. Bayeux Tapestry likely first goes on display to decorate the nave during the consecration of Notre-Dame of Bayeux Cathed

    Bayeux Tapestry likely first goes on display to decorate the nave during the consecration of Notre-Dame of Bayeux Cathedral in Bayeux, Normandy [1]

Events After

  1. Wibbert of Ravenna chosen as anti-pope Clement III

    Wibbert of Ravenna chosen as anti-pope Clement III

  2. Alexios I Komnenos is crowned Byzantine emperor

    Alexios I Komnenos, Latinized as Alexius I Comnenus, was Byzantine emperor from 1081 to 1118.

  3. Battle of Dyrrhachium: Southern Italian Normans under Robert Guiscard defeat Byzantine army under Alexios I Komnenos (mo

    Battle of Dyrrhachium: Southern Italian Normans under Robert Guiscard defeat Byzantine army under Alexios I Komnenos (modern Durrës, Albania)

  4. Emperor Henry V is born

    Emperor Henry V is born

  5. Battle at Mailberg: Vratislav II of Bohemia defeats Leopold II, Margrave of Austria

    Leopold II (1050 – 12 October 1095), known as Leopold the Fair (German: Luitpold der Schöne), a member of the House of Babenberg, was Margrave of Austria from 1075 until his death in 1095.

More from the 1070s

Frequently Asked Questions

What happened on March 6, 1079?
Persian polymath Omar Khayyam completes the Jalali calendar, a solar calendar with a precise 33-year intercalation cycle and the basis for the Persian calendar still in use today

Explore More