#음력(lunar calendar), #양력(solar calendar) Korea has two calendar systems, one is lunar, the other is solar. Korea's biggest two national holidays, #설날(new year's day)' #추석(Thanksgiving day) are based on the lunar calendar system. Lunar August 15th is #추석 and lunar January 1st is #설날. Therefore, the solar calendar days of #추석, #설날 are different each year. For example, this year's #추석 is September ..