UTC to KST to PDT Time Converter
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Selected conversion
12:00 pm12:00 UTC (UTC+0), Oct 15, 2026 = 9:00 pm21:00 KST (UTC+9), Oct 15, 2026 = 5:00 am05:00 PDT (UTC-7), Oct 15, 2026
UTC is 9 hours behind KST. UTC is 7 hours ahead of PDT.
How the time difference changes
UTC to KST
UTC is 9 hours behind KST year-round.
Working hours of 9:00 am to 6:00 pm in UTC correspond to 6:00 pm to 3:00 am (next day) in KST.Working hours of 09:00 to 18:00 in UTC correspond to 18:00 to 03:00 (next day) in KST.
UTC to PDT
For most of the year, UTC is 7 hours ahead of PDT. From Nov 1, 2026 to Mar 14, 2027, UTC is 8 hours ahead of PST.
For most of the year, working hours of 9:00 am to 6:00 pm in UTC correspond to 2:00 am to 11:00 am in PDT. At other times of the year, working hours of 9:00 am to 6:00 pm in UTC correspond to 1:00 am to 10:00 am in PST.For most of the year, working hours of 09:00 to 18:00 in UTC correspond to 02:00 to 11:00 in PDT. At other times of the year, working hours of 09:00 to 18:00 in UTC correspond to 01:00 to 10:00 in PST.
Compare UTC time with KST and PDT time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
Coordinated Universal Time is 9 hours behind Korea Standard Time. Coordinated Universal Time is 7 hours ahead of Pacific Daylight Time.
12:00 pm12:00 in UTC is 9:00 pm21:00 in KST and is 5:00 am05:00 in PDT
UTC to KST call time
Best time for a conference call or a meeting is between 8:30am-9:30am08:30-09:30 in UTC which corresponds to 5:30pm-6:30pm17:30-18:30 in KST. Their 9am–6pm09:00–18:00 working hours do not overlap; this is a suggested compromise.
UTC to PDT call time
Best time for a conference call or a meeting is between 4pm-6pm16:00-18:00 in UTC which corresponds to 9am-11am09:00-11:00 in PDT
12:00 pm12:00 Coordinated Universal Time (UTC). Offset UTC 0:00 hours
9:00 pm21:00 Korea Standard Time (KST). Offset UTC +9:00 hours
5:00 am05:00 Pacific Daylight Time (PDT). Offset UTC -7:00 hours
12:00 pm12:00 UTC / 9:00 pm21:00 KST / 5:00 am05:00 PDT
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| UTC | KST | PDT |
|---|---|---|
| 9:00am | 5:00pm previous day | |
| 10:00am | 6:00pm previous day | |
| 11:00am | 7:00pm previous day | |
| 12:00pm | 8:00pm previous day | |
| 1:00pm | 9:00pm previous day | |
| 2:00pm | 10:00pm previous day | |
| 3:00pm | 11:00pm previous day | |
| 4:00pm | 12:00am | |
| 5:00pm | 1:00am | |
| 6:00pm | 2:00am | |
| 7:00pm | 3:00am | |
| 8:00pm | 4:00am | |
| 9:00pm | 5:00am | |
| 10:00pm | 6:00am | |
| 11:00pm | 7:00am | |
| 12:00am next day | 8:00am | |
| 1:00am next day | 9:00am | |
| 2:00am next day | 10:00am | |
| 3:00am next day | 11:00am | |
| 4:00am next day | 12:00pm | |
| 5:00am next day | 1:00pm | |
| 6:00am next day | 2:00pm | |
| 7:00am next day | 3:00pm | |
| 8:00am next day | 4:00pm | |
| 09:00 | 17:00 previous day | |
| 10:00 | 18:00 previous day | |
| 11:00 | 19:00 previous day | |
| 12:00 | 20:00 previous day | |
| 13:00 | 21:00 previous day | |
| 14:00 | 22:00 previous day | |
| 15:00 | 23:00 previous day | |
| 16:00 | 00:00 | |
| 17:00 | 01:00 | |
| 18:00 | 02:00 | |
| 19:00 | 03:00 | |
| 20:00 | 04:00 | |
| 21:00 | 05:00 | |
| 22:00 | 06:00 | |
| 23:00 | 07:00 | |
| 00:00 next day | 08:00 | |
| 01:00 next day | 09:00 | |
| 02:00 next day | 10:00 | |
| 03:00 next day | 11:00 | |
| 04:00 next day | 12:00 | |
| 05:00 next day | 13:00 | |
| 06:00 next day | 14:00 | |
| 07:00 next day | 15:00 | |
| 08:00 next day | 16:00 |
Coordinated Universal Time
Offset: UTC is the same as Greenwich Mean Time (GMT).
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
Korea Standard Time
Offset: KST is 9 hours ahead of Greenwich Mean Time (GMT).
Countries using this time zone: Korea (North), Korea (South)
Principal Cities: The largest city in the KST time zone is Seoul in South Korea, with about 10.349 million people. Other major cities in this time zone include Busan, Pyongyang, Incheon, Daegu.
Daylight Saving: Clocks in Korea Standard Time (KST) do not change for daylight saving time, so KST stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter; see upcoming clock changes worldwide.
KST representations, usage and related time zones
- +09 - basic short
- +0900 - basic
- +09:00 - extended
- +0900 - sign character (+) followed by a four digit time providing hours (09) and minutes (00) of the offset. Indicates an offset of nine hours to the east of the zero meridian.
- India - Military abbreviation for KST
- I - short form of 'India'
- Asia/Pyongyang
- Asia/Seoul
- ROK
- Korea Standard Time - UTC +9
- Pyongyang Time - UTC +8:30
- AWDT - Australian Western Daylight Time
- CHOST - Choibalsan Summer Time
- I - India Time Zone
- IRKST - Irkutsk Summer Time
- JST - Japan Standard Time
- KST - Korea Standard Time
- PWT - Palau Time
- TLT - East Timor Time
- ULAST - Ulaanbaatar Summer Time
- WIT - Eastern Indonesian Time
- YAKT - Yakutsk Time
Pacific Daylight Time
Offset: PDT is 7 hours behind Greenwich Mean Time (GMT).
Countries using this time zone: Canada, Mexico, United States
Principal Cities: The largest city in the PDT time zone is Los Angeles in the United States, with about 3.821 million people. Other major cities in this time zone include Tijuana, San Diego, Mexicali, San Jose.
French: HAP - Heure Avancée du Pacifique
Spanish: PT - Zona Noroeste
Today all shaded areas are on PDT.
Daylight Saving: Pacific Daylight Time (PDT) is a daylight saving/summer time zone. During winter, some places set clocks back one hour and observe Pacific Standard Time (PST).
Start: Pacific Daylight Time (PDT) started on Sunday, March 8, 2026 at 2:00 am02:00 local time and clocks were set one hour forward to Sunday, March 8, 2026, 3:00 am03:00. Daylight saving starts annually on the second Sunday of March.
End: Pacific Daylight Time (PDT) ends on Sunday, November 1, 2026 at 2:00 am02:00 local time and clocks are set one hour back to Sunday, November 1, 2026, 1:00 am01:00 local standard time instead. Daylight saving ends annually on the first Sunday of November.
PDT representations, usage and related time zones
- -07 - basic short
- -0700 - basic
- -07:00 - extended
- -0700 - sign character (-) followed by a four digit time providing hours (07) and minutes (00) of the offset. Indicates an offset of seven hours to the west of the zero meridian.
- Tango - Military abbreviation for PDT
- T - short form of 'Tango'
- America/Ensenada
- America/Los_Angeles
- America/Santa_Isabel
- America/Tijuana
- America/Vancouver
- Canada/Pacific
- Mexico/BajaNorte
- PST8PDT
- US/Pacific
- MST - Mountain Standard Time
- PDT - Pacific Daylight Time
- YST - Yukon Standard Time
- T - Tango Time Zone