korean public school-year calendar 2012?

Just looking ahead at the remainder of this year and trying to plan some things...I was wondering if any of you out there (especially public school EPIK people) might know the official calendar days for schools in Korea?  I know this year that most students are having their summer break July 23-August 17.  I was hoping that someone could tell me the remaining official days off for this year:  Chuseok, other holidays, and winter vacation days.

I appreciate the help...thanks.