The one of big holiday of Korea, normally 3 ~ 4 days holidays.
I think I can put meaning of Chuseok is thanks giving day, or the harvest moon festival.
It has another name, is called Hangawi.
[Han] meaning is ‘Huge’, [gawi] meaning is ‘middle of fall or middle of august’.
so Hangawi meaning is the huge days of fall or august.
At this holiday, Korean willing to be with family, it custom make traffic jam all around of Korea.
Avoid traveling at this holiday.