<P> The 100th - day anniversary of a baby is called baegil (백 일), which literally means "a hundred days" in Korean, and is given a special celebration, marking the survival of what was once a period of high infant mortality . The first anniversary of birth named dol (돌) is likewise celebrated, and given even greater significance . South Koreans celebrate their birthdays, even though every South Korean gains one' sal' on New Year's Day . Because the first year comes at birth and the second on the first day of the New Year, children born, for example, on December 29 will reach two years of age on the New Year's Day, when they are only days old in western reckoning . Hence, everyone born on the same calendar year effectively has the same age and can easily be calculated by the formula: Age = (Current Year - Birth Year) + 1 </P> <P> In modern South Korea the traditional system is most often used . The international age system is referred to as "man - nai" (만나이) in which "man" (만) means "full" or "actual", and "nai" (나이) meaning "age". For example, man yeol sal means "full ten years", or "ten years old" in English . The Korean word dol means "years elapsed", identical to the English "years old", but is only used to refer to the first few birthdays . Cheotdol or simply dol refers to the first Western - equivalent birthday, dudol refers to the second, and so on . </P> <P> The traditional system is ditched in modern North Korea since 1980s . </P> <P> The Korean Birthday Celebrations by the lunar calendar is called eumnyeok saeng - il (음력 생일, 陰曆 生日) and yangnyeok saeng - il (양력 생일, 陽曆 生日) is the birthday by Gregorian calendar . </P>

How old are you when your born in china