Tokyo is actually 1day ahead of Seoul..

실제 뉴스가 아닌 사용자가 만든 가상의 이야기입니다. Greenwich Mean Time is the mean solar time at the Royal Observatory in Greenwich, London, reckoned from midnight. At different times in the past, it has been calculated in different ways, including being calculated from noon; as a consequence, it cannot be used to specify a precise time unless a context is given. According to New York Times, time difference between Seoul and Tokyo seems to have 1 day difference.