The way Koreans keep track of their age is so confusing. Several Asian cultures actually adhere to East Asian age reckoning. When you are born you are 1 year old. On your birthday your age doesn't change. Everyone's age changes on January 1st -- the new year. This allows for some interesting situations. The most extreme situation: Say you are born at 11:59pm on December 31st. One minute later when it is January 1st you will be considered 2 years old.
I have to ask Koreans which year they were born to get a true sense of how old they are.
Then there is the whole Lunar calendar birthday thing, which is another can of worms.
So, happy birthday everyone???