Korean birthday celebrations have a rich history and are steeped in tradition and customs that reflect the country's values and beliefs. Before Western influence, Koreans marked the 100th day after a baby's birth as a significant milestone, but with the advent of Western culture, they began to adopt the practice of celebrating birthdays. Preparation for Korean birthday celebrations often begins weeks or even months in advance, and traditional Korean foods such as seaweed soup (miyeokguk) and rice cake (tteok) play an essential role. Birthday traditions differ for children and adults, with children receiving money as gifts from guests and participating in a traditional ceremony called doljabi. Koreans also believe in many superstitions related to birthdays, such as avoiding giving gifts in sets of four. Gift-giving is an integral part of Korean birthday celebrations, with popular gifts including cosmetics, accessories, electronics, books, and money. Modern trends include virtual parties and digital invitations.