On what day in 1066 was William I crowned King of England in Westminster Abbey?

Question

In 1284, Prince Edward (later King Edward II of England), the first son born to Edward I of England, was the first English-born what?

Answer 1

Christmas Day
Although Harold II is thought to have been crowned in the Abbey early in 1066, William the Conqueror's was the first documented coronation held there. The Abbey had been consecrated at the end of 1065 but was not completed until some 24 years later in 1090.