koreanfestivals1-4, Exercise 1: Names, date and translation

Model answer:

Chuseok (추석): literally "autumn evening". Hangawi (한가위): from Old Korean, "the great middle [of autumn]".
Date: the 15th day of the 8th month of the lunisolar calendar, on the full moon. In South Korea it lasts three days (the day before, the day itself and the day after the full moon).
"Korean Thanksgiving" can mislead because the article says the holidays are "vastly different in origin and celebration"; the label helps an outsider find the holiday but hides what is different about it.

Source: Wikipedia, Chuseok.