Question: When does the green knight appear in camelot?
Disambiguated questions and answers: question: In what century does the Green Knight appear in Camelot?
During what time period does the Green Knight appear in Camelot?
In what literature does the Green Knight appear?
answer: 14th century
Christmas Eve
Sir Gawain and the Green Knight
Natural Questions answer: New Year 's Day (from the Wikipedia article "Sir Gawain and the Green Knight")