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 in the past.[clarification needed] Korea Standard Time is the same as Japan Standard Time, Indonesian Eastern Standard Time and Irkutsk Time. It is inversed by 12 hours behind UTC+09:00 for Paraguay Summer Time, Brasilia Time, Argentina Time, Uruguay Time, Chile Summer Time, Atlantic Daylight Time. (UTC-03:00)
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.