Generally Celebrating the first birthday of a child is a joyous occasion in any culture. We call the first birthday party as “dol” or “doljanchi” in Korean.
Traditionally the number 100 has a deep meaning of maturity in Korea.
If the child was in good health, the spirit was honored with offerings of rice and sea mustard soup in gratitude for having cared for the infant and the mother, and for having helped them live through a difficult period.