Korea Standard Time
Korea Standard Time (KST; Korean: 한국 표준시 or 조선 표준시; Hanja: 韓國標準時 or 朝鮮標準時; Han-guk pyojunsi or Chosŏn p'yochunsi) is the standard time zone in North and South Korea and is 9 hours ahead of UTC (UTC+09:00): i.e., when it is midnight (00:00) UTC, it is 9 am (09:00) Korea Standard Time. Korea does not currently observe daylight saving time but has experimented with it during 1988 Seoul Olympics.Korea Standard Time is the same as Japan Standard Time, Indonesian Eastern Standard Time and Yakutsk Time.
The Korean Empire adopted a standard time of 8.5 hours ahead of UTC. In 1912, following the introduction of Imperial Japanese rule, the colonial government changed this to UTC+09:00 to align with Japan Standard Time. In 1954 it was reverted to UTC+08:30 and then in 1961, it was changed to UTC+09:00 again.