Korean Standard Time
Korean Standard Time (KST) is a time zone that is used in South Korea. It is 9 hours ahead of UTC (UTC+09:00) and is the same as Japan Standard Time, Yakutsk Time, and Indonesian Eastern Standard Time. It was used in North Korea until 15 August 2015 when it switched to Pyongyang Time (PYT) (UTC+08:30). South Korea does not observe daylight saving time.