What is Korean Thanksgiving called?

Also Chuseok lasts from 9th September to 12th September

For people who are curious about other answers options in this question "Hanguk" is official name of South Korea in Korean language "Hyundai" is South Korean company producing cars (and motors?) "Yin Yang" is a Chinese philosophical concept that describes opposite forces which are interconnected. In Chinese cosmology, the universe creates itself out of a primary chaos of material energy, organized into the cycles of yin and yang and formed into objects and lives

This is similar to the Mexican holiday named Día de los Muertos (Day of the Dead) where people gather around their deceased loved ones; desiring for them to have a safe journey to the world beyond. The families of the dead take food drink and what the loved one liked. For example if they liked soccer; a pennant of the team; a jersey a picture of their favorite play...just how small our world is and to be open to others customs beliefs and traditions