The 1040s was a decade of the Julian Calendar which began on January 1, 1040, and ended on December 31, 1049. Significant people King Macbeth of Scotland (d. 1057) Godwin, Earl of Wessex (d. 1053) El Cid (b. 1040) Yaroslav I the Wise Al-Qa'im (caliph of Baghdad) References