Here's a few things I know...
AGEUm, well my Korean friends told me that you're about 2 years older in Korea. They said that when you're born in Korea you're 1 year old already and when it's New Year you turn one year older. So if you're like say 13 here, you're 14 or 15 in Korea.
BIRTHDAYI think that it's a tradition to slurp seaweed soup on your Birthday.
SCHOOLMy friends said that you wear uniforms to school in Middle School and High School. You come to school and study and don't usually get lots of H.W but there are major tests that you need to pass. If this is not true then blame my friends xD
CLOTHINGWhen there's a special event like weddings, birthday, ect..Women wear Hanbok Dress. Like these:


I suggest you
Click here to find out more because it's way better than what I typed up there. xP