A Korean birthday is not only about cake. In many homes, miyeokguk appears at breakfast, linking an ordinary bowl of seaweed soup with the idea of birth and family care.
Cake and miyeokguk do different jobs
Korea.net’s guide to Korean life and culture says Koreans usually eat miyeokguk, seaweed soup, for breakfast on birthdays. It is not a rule followed identically by every household, but the association is familiar enough to function as everyday birthday shorthand.
A birthday food connected to birth itself
Miyeokguk is also traditionally associated with food eaten after childbirth, which provides cultural context for why the soup can point back to the day of birth. The linked KBS Entertain clip shows a birthday miyeokguk being cooked on an actual television programme, giving the custom a concrete everyday setting rather than an invented illustration.