Seoul to UTC Time Converter
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Selected conversion
9:00 pm21:00 KST (UTC+9), Oct 19, 2026 = 12:00 pm12:00 UTC (UTC+0), Oct 19, 2026
Seoul is 9 hours ahead of UTC.
How the time difference changes
Seoul is 9 hours ahead of UTC year-round.
Working hours of 9:00 am to 6:00 pm in Seoul correspond to 12:00 am to 9:00 am in UTC.Working hours of 09:00 to 18:00 in Seoul correspond to 00:00 to 09:00 in UTC.
Compare Seoul time with UTC time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
KST (Korea Standard Time) is 9 hours ahead of Coordinated Universal Time.
9:00 pm21:00 in Seoul, South Korea is 12:00 pm12:00 in UTC
Seoul to UTC call time
Best time for a conference call or a meeting is between 5:30pm-6:30pm17:30-18:30 in Seoul which corresponds to 8:30am-9:30am08:30-09:30 in UTC. Their 9am–6pm09:00–18:00 working hours do not overlap; this is a suggested compromise.
9:00 pm21:00 KST (Korea Standard Time) (Seoul, South Korea). Offset UTC +9:00 hours
12:00 pm12:00 Coordinated Universal Time (UTC). Offset UTC 0:00 hours
9:00 pm21:00 Seoul, South Korea / 12:00 pm12:00 UTC
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Seoul Time Zone and Facts
Time Zone
Seoul Facts
Coordinated Universal Time
Offset: UTC is the same as Greenwich Mean Time (GMT).
Countries using this time zone: Antarctica, Burkina Faso, Faroe Islands, Gambia, Ghana, Greenland, Guernsey, Guinea, Guinea-Bissau, Iceland, Ireland, Isle of Man, Ivory Coast, Jersey, Liberia, Mali, Mauritania, Morocco, Portugal, Saint Helena, São Tomé and Príncipe, Senegal, Sierra Leone, Spain, Togo, United Kingdom, Western Sahara
Principal Cities: The largest city in the UTC time zone is London in the United Kingdom, with about 8.962 million people. Other major cities in this time zone include Abidjan, Bamako, Casablanca, Dakar.
Coordinated Universal Time (UTC) is the world time standard that regulates clocks and time. It is the successor to Greenwich Mean Time (GMT). For casual use, UTC is the same as GMT, but UTC is the standard the scientific community uses.
UTC has been the time standard commonly used across the world since 1972. It is used in many technical fields, such as aviation and meteorology, and to synchronize time across internet networks.
Today some of the lighter areas are on UTC+1 (British Summer Time, Irish Standard Time, WEST).
UTC representations, usage and related time zones
- Z - is the zone designator for the zero UTC/GMT offset, also known as 'Zulu' time
- +00 - basic short
- +0000 - basic
- +00:00 - extended
- +0000 - sign character (+) followed by a four digit time providing hours (00) and minutes (00) of the offset. Indicates the zero UTC/GMT offset.
- Zulu - Military abbreviation for UTC
- Z - short form of 'Zulu'
- Etc/UCT
- Etc/UTC
- Etc/Universal
- Etc/Zulu
- UCT
- UTC
- Universal
- Zulu
- EGST - Eastern Greenland Summer Time
- GMT - Greenwich Mean Time
- WET - Western European Time
- AZOST - Azores Summer Time
- UTC - Coordinated Universal Time
- WT - Western Sahara Standard Time
- Z - Zulu Time Zone