The 100th birthday party has a special meaning in Korea. In the past, many babies died soon after they were born. It was because that many people had insufficient medical knowledge about sanitation ,and a sharp change in the weather made babies got new diseases. Therefore, people used to celebrate the 100th birthday especially meaning that babies overcame difficult situations. In the day, families invite guests like relatives and neighborhoods and give a lot of food. Invited guests give babies presents like thread hoping babies will be healthy and have a longlife.