KST to AKDT Converter
Convert time between Korea Standard Time (KST) and Alaska Daylight Time (AKDT)
Korea Standard Time (KST)
Alaska Daylight Time (AKDT)
Time Difference
Alaska Daylight Time (AKDT) is 0 hours ahead of Korea Standard Time (KST)
Select Date
Select Time
Quick Reference
| KST | AKDT |
|---|---|
| 11:00 | 18:00 |
| 13:00 | 20:00 |
| 15:00 | 22:00 |
| 17:00 | 00:00 |
| 19:00 | 02:00 |
| 21:00 | 04:00 |
| 23:00 | 06:00 |
| 01:00 | 08:00 |
| 03:00 | 10:00 |
| 05:00 | 12:00 |
| 07:00 | 14:00 |
| 09:00 | 16:00 |
Top 10 Most Common Time Zones
| Abbreviation | Full Name | UTC Offset | Typical Use |
|---|---|---|---|
| UTC | Coordinated Universal Time | UTC ±0 | Global reference standard (servers, logs, APIs) |
| EST / EDT | Eastern (US) Time | UTC −5 / −4 | New York, Toronto — North American business hub |
| CST / CDT | Central (US) Time | UTC −6 / −5 | Chicago, Dallas — US central business region |
| PST / PDT | Pacific (US) Time | UTC −8 / −7 | San Francisco, Los Angeles — tech industry standard |
| GMT / BST | Greenwich Mean / British Summer Time | UTC 0 / +1 | UK, used globally as a reference with UTC |
| CET / CEST | Central European (Summer) Time | UTC +1 / +2 | Paris, Berlin, Amsterdam — EU business core |
| IST | India Standard Time | UTC +5:30 | India — major IT & outsourcing region |
| CST | China Standard Time | UTC +8 | Beijing, Shanghai — East Asia business hub |
| JST | Japan Standard Time | UTC +9 | Tokyo — finance & tech hub |
| AEST / AEDT | Australian Eastern (Daylight) Time | UTC +10 / +11 | Sydney, Melbourne — APAC regional business |
Why Time Zone Abbreviations Are Ambiguous
Unlike standardized identifiers (like America/New_York or Europe/London from the IANA tz database), abbreviations such as "CST" or "IST" are not globally unique. They can refer to different time zones depending on context — country, region, or even time of year (due to daylight saving time).
Common Ambiguous Time Zone Abbreviations
| Abbrev. | Common Meaning(s) | UTC Offset | Region(s) |
|---|---|---|---|
| CST | Central Standard Time / China Standard Time / Cuba Standard Time | UTC−6 / UTC+8 / UTC−5 | North America, China, Cuba |
| IST | Indian Standard Time / Irish Standard Time / Israel Standard Time | UTC+5:30 / UTC+1 / UTC+2 | India, Ireland, Israel |
| AST | Atlantic Standard Time / Arabia Standard Time | UTC−4 / UTC+3 | Caribbean, Canada, Middle East |
| PST | Pacific Standard Time / Philippine Standard Time | UTC−8 / UTC+8 | North America, Philippines |
| EST | Eastern Standard Time (North America / Australia) | UTC−5 / UTC+10 | North America, Australia |
✅ Best Practice
To avoid ambiguity, always:
- Use IANA tz identifiers — e.g.,
America/New_Yorkinstead of "EST" - Specify UTC offset explicitly — e.g.,
UTC−5when abbreviations must be used - Include the full timezone name — e.g., "Eastern Standard Time (EST)" with UTC offset
About KST to AKDT Time Conversion
Converting time between Korea Standard Time (KST) and Alaska Daylight Time (AKDT) bridges Seoul, Busan, Incheon, and the rest of South Korea with Anchorage and Fairbanks. KST is UTC+9 while AKDT is UTC-8, placing AKDT 17 hours behind KST.
This converter uses the IANA timezone database for accurate calculations. South Korea does not observe daylight saving time, so KST is constant year-round. AKDT is in effect from March to November; the 17-hour offset applies during that window. After DST ends, the offset becomes 18 hours between KST and AKST.
Common Use Cases for KST to AKDT Conversion
Business & Work
- Scheduling meetings between Korean partners and Alaska-based teams
- Coordinating semiconductor, automotive, and tech industry projects between regions
- Planning conference calls between Seoul or Busan and Anchorage
Personal & Travel
- Planning travel itineraries between South Korea and Alaska
- Coordinating with family and friends in Alaska from Korea
- Scheduling virtual events for KST and AKDT audiences
Time Zone Information
Korea Standard Time (KST)
- UTC Offset: UTC+9
- IANA Timezone: Asia/Seoul
- Daylight Saving: South Korea does not observe daylight saving time
- Major Cities: Seoul, Busan, Incheon, Daegu, Daejeon, Gwangju
- Coverage: South Korea year-round; same offset as Japan (JST)
Alaska Daylight Time (AKDT)
- UTC Offset: UTC-8
- IANA Timezone: America/Anchorage
- Daylight Saving: Second Sunday in March to First Sunday in November
- Major Cities: Anchorage, Fairbanks, Juneau, Sitka
- Coverage: Most of Alaska during daylight saving period
Quick Reference: KST to AKDT
Remember: AKDT is always 17 hours behind KST during Alaska's daylight saving period
Frequently Asked Questions
What is the time difference between KST and AKDT?
Korea Standard Time (KST) is UTC+9, while Alaska Daylight Time (AKDT) is UTC-8. AKDT is 17 hours behind KST. When it is 12:00 PM in Seoul, it is 7:00 PM the previous day in Anchorage.
When does this KST to AKDT conversion apply?
AKDT runs from the second Sunday in March to the first Sunday in November. South Korea does not observe DST and stays on KST year-round. The 17-hour offset applies during Alaska's DST window.
How does the time difference change throughout the year?
When Alaska reverts to AKST (UTC-9) in November, the offset to KST grows to 18 hours. KST itself never changes — South Korea has not observed daylight saving time since the 1980s.
What are the best times for KST-AKDT business calls?
Early morning in Seoul (9:00 AM KST) is 4:00 PM the previous day in Anchorage — workable for both sides. The 17-hour gap leaves narrow live overlap, so most coordination happens at the edges of each working day.
Which countries/regions use AKDT timezone?
AKDT covers most of Alaska during daylight saving, including Anchorage, Fairbanks, Juneau, and Sitka. The Aleutian Islands use Hawaii-Aleutian Time and follow a different rule set.
Which countries/regions use KST timezone?
KST is observed in South Korea year-round. Major cities include Seoul, Busan, Incheon, Daegu, Daejeon, and Gwangju. North Korea also uses UTC+9 (called Pyongyang Time).
Pro Tips
- • AKDT is 17 hours behind KST — subtract 17 hours from a Seoul time to get the Anchorage time.
- • Most KST to AKDT conversions cross into the previous calendar day in Alaska.
- • Best meeting window: 9:00–11:00 AM KST overlaps with 4:00–6:00 PM previous-day AKDT.
- • South Korea does not observe DST. Only the AKDT side shifts; KST is constant year-round at UTC+9.
- • Use IANA identifiers (Asia/Seoul and America/Anchorage) in calendar tools to handle DST transitions automatically.
- • When Alaska reverts to AKST in November, the offset to Seoul becomes 18 hours.