KST to AKST
-18hKST
KSTSOURCEAKST
AKSTGreen rows indicate typical business hours (9 AM - 5 PM)
KST and AKST on the World Map
The map below highlights the KST (Korea Standard Time) and AKST (Alaska Standard Time) timezone regions across the globe.
KST – Korea Standard Time
UTC+09:00Korea Standard Time (KST) is the time zone for South Korea, 9 hours ahead of UTC.
- •South Korea does not observe daylight saving time.
- •Seoul is home to Samsung, LG, and Hyundai headquarters.
- •KST is the same offset as JST (UTC+09:00).
AKST – Alaska Standard Time
UTC-09:00Alaska Standard Time (AKST) is the time zone for the state of Alaska, 9 hours behind UTC.
- •Alaska is the largest US state by area but has only about 730,000 residents.
- •Anchorage is the most populous city in AKST with about 290,000 people.
- •The Aleutian Islands use HAST instead of AKST.
Everything You Need to Know About KST and AKST Time
KST runs on Korea Standard Time (KST) at UTC+09:00. AKST runs on Alaska Standard Time (AKST) at UTC-09:00. That puts KST 18 hours behind AKST — a difference of -18h at the current offsets.
In practice, when it is 9:00 AM in KST it is 3:00 PM in AKST on the previous day. Midnight in KST is 6:00 AM in AKST. Neither zone observes daylight saving time, so the offset between them stays constant all year.
KST to AKST time conversion table
| KST (KST) | AKST (AKST) | Day |
|---|---|---|
| 12:00 AM | 6:00 AM | previous day |
| 6:00 AM | 12:00 PM | previous day |
| 7:00 AM | 1:00 PM | previous day |
| 8:00 AM | 2:00 PM | previous day |
| 9:00 AM | 3:00 PM | previous day |
| 12:00 PM | 6:00 PM | previous day |
| 3:00 PM | 9:00 PM | previous day |
| 5:00 PM | 11:00 PM | previous day |
| 6:00 PM | 12:00 AM | same day |
| 9:00 PM | 3:00 AM | same day |
Why people convert KST to AKST time
- Scheduling a call from KST to AKST: a 10:00 AM start in KST lands at 4:00 PM in AKST the previous day, so you can confirm the slot without doing the arithmetic yourself.
- Handling a -18h gap: KST and AKST have no overlap inside a normal 9-to-5 day, so real-time meetings need an early-morning or late-evening slot on one side. 9:00 AM in AKST is 3:00 PM in KST.
- Coordinating a KST-based team with AKST contacts: quoting times in the other side's local clock — not your own — removes the single biggest source of missed meetings.
- Always state the zone abbreviation, not just the hour. "3:00 PM KST" is unambiguous; "3 PM" across a -18h gap is not.
- With a -18h gap there is no shared 9-to-5 window, so alternate the early start: one week KST takes the early slot, the next week AKST does.
About KST (Korea Standard Time)
Korea Standard Time (KST) is the time zone used in South Korea. It shares the same UTC offset as Japan Standard Time but is a distinct time zone. South Korea does not observe daylight saving time. Seoul, the capital, is a major global tech and business hub.
About AKST (Alaska Standard Time)
Alaska Standard Time (AKST) is used in nearly all of Alaska. Due to Alaska's vast geographic size, the Aleutian Islands use Hawaii-Aleutian Standard Time instead. During summer months, Alaska switches to Alaska Daylight Time (AKDT, UTC-08:00).
Best time to call between KST and AKST
With a -18h offset there is no overlap inside a normal 9 AM – 5 PM day. AKST opens at 9:00 AM AKST, which is 3:00 PM in KST, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
KST and AKST have no shared working hours because of the -18h gap. Teams need to alternate early starts or rely on asynchronous handovers.
KST is 18 hours behind AKST (KST UTC+09:00 → AKST UTC-09:00). There is no shared 9-to-5 window, so plan around an early or late slot. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
KST
Does not observe DST
AKST
☀ Currently in DST
Standard: UTC-09:00 · DST: UTC-08:00
Clocks fall back on Sun, Nov 1, 2026
Learn More About Time
Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:
Frequently Asked Questions
What is the time difference between KST and AKST?
KST (KST, UTC+09:00) is 18 hours behind AKST (AKST, UTC-09:00). The gap is currently -18h.
How do I convert KST time to AKST time?
Add -18h to KST local time. For example, 9:00 AM in KST is 3:00 PM in AKST (previous day).
What time is it in AKST right now?
AKST uses AKST at UTC-09:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -18h offset from KST.
What is the best time to call AKST from KST?
There is no shared working-hours window because of the -18h gap. The closest option is 1:00 PM in KST, which is 7:00 PM in AKST.
Which is behind, KST or AKST?
KST is 18 hours behind AKST. When it is 12:00 PM in KST it is 6:00 PM in AKST.
Does daylight saving time affect the KST–AKST difference?
Neither zone observes daylight saving time, so the -18h offset between KST and AKST is fixed all year.
Which other cities share KST's time zone?
KST also covers Seoul, Busan, Incheon, Daegu, Daejeon, Pyongyang.
Which countries use KST, KST's zone?
KST is used in South Korea, North Korea.
Is there a day difference between KST and AKST?
Sometimes. The -18h gap is large enough that 8:00 PM or later in KST already falls on the in AKST.
What is the time difference between KST and AKST?
AKST is -18h from KST.
What timezone is KST in?
KST operates on its local timezone.
What timezone is AKST in?
AKST operates on its local timezone.
Which countries use KST (Korea Standard Time)?
KST is used in South Korea, North Korea.
Does KST observe daylight saving time?
No, KST does not observe daylight saving time and remains at UTC+09:00 year-round.
What are some interesting facts about KST?
South Korea does not observe daylight saving time. Seoul is home to Samsung, LG, and Hyundai headquarters.
Which cities are in the AKST timezone?
Major cities in the AKST timezone include Anchorage, Fairbanks, Juneau, Sitka, Wasilla.
What is the UTC offset for AKST?
Alaska Standard Time (AKST) is at UTC-09:00. During daylight saving time, it shifts to AKDT.
What should I know about the AKST timezone?
Alaska is the largest US state by area but has only about 730,000 residents. Anchorage is the most populous city in AKST with about 290,000 people.
When is it midnight in KST, what time is it in AKST?
When it is 12:00 AM (midnight) in KST (KST), it is -18h later in AKST (AKST).
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