the year when the Battle of Hastings took place, and the Normans gained control of England. It is one of the few dates that most British people remember, because it was the last time that Britain was successfully invaded by the forces of another country.
1066
Meaning of 1066 in English
Oxford guide to British and American culture English vocabulary. Руководство по британской и американской культуре, Оксфордский английский словарь. 2005