Does it account for Daylight Saving Time?

Yes, our converter uses the IANA timezone database, which includes all current DST rules for every timezone in the world.

UTC (Coordinated Universal Time) is the primary time standard by which the world regulates clocks. All timezones are defined as offsets from UTC.

Can I compare multiple timezones at once?

Yes, you can add multiple cities or timezones and see the equivalent times side by side.

How many timezones are there in the world?

There are 38 distinct UTC offsets in use, ranging from UTC-12 to UTC+14. This includes half-hour (UTC+5:30 India, UTC+9:30 Australia) and 45-minute offsets (UTC+5:45 Nepal, UTC+8:45 Australia).

What is the International Date Line?

The International Date Line (IDL) runs roughly along the 180° meridian in the Pacific Ocean. When you cross it westward, you gain a day; crossing eastward, you lose a day.

Why do some timezones have 30 or 45 minute offsets?

Countries chose offsets that best matched their solar noon. India uses UTC+5:30 and Nepal uses UTC+5:45 because standard hourly offsets didn't align well with their geography.

Which country has the most timezones?

France has the most (12 timezones) due to overseas territories. Russia spans 11 timezones. The US has 6 (including Hawaii and Alaska).

KST to Thailand

-2h

KST

KSTSOURCE

UTC+09:00

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Thailand

ICT

UTC+07:00

HH10

MM00

10:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

KST

Thailand

12:00 AM

10:00 PM-1

2:00 AM

12:00 AM

4:00 AM

2:00 AM

6:00 AM

4:00 AM

8:00 AM

6:00 AM

10:00 AM

8:00 AM

12:00 PM

10:00 AM

2:00 PM

12:00 PM

4:00 PM

2:00 PM

6:00 PM

4:00 PM

8:00 PM

6:00 PM

10:00 PM

8:00 PM

Green rows indicate typical business hours (9 AM - 5 PM)

KST and ICT on the World Map

The map below highlights the KST (Korea Standard Time) and ICT (Indochina Time) timezone regions across the globe.

KST Zone

→

ICT Zone

Explore all world timezones interactively →

KST – Korea Standard Time

UTC+09:00

Korea Standard Time (KST) is the time zone for South Korea, 9 hours ahead of UTC.

Countries in KST

South KoreaNorth Korea

Major Cities in KST

SeoulBusanIncheonDaeguDaejeonPyongyang

Key Facts about KST

•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).

Daylight Saving:No – UTC+09:00 year-round

Learn more about KST on Wikipedia

ICT – Indochina Time

UTC+07:00

Indochina Time (ICT) is the time zone for Vietnam, Thailand, Laos, and Cambodia, 7 hours ahead of UTC.

Countries in ICT

ThailandVietnamCambodiaLaosIndonesia (WIB)

Major Cities in ICT

BangkokHo Chi Minh CityHanoiJakartaPhnom PenhVientiane

Key Facts about ICT

•Bangkok is one of the most visited cities in the world.
•ICT is 12 hours ahead of EST.
•Thailand, Vietnam, and Cambodia all share ICT.

Daylight Saving:No – UTC+07:00 year-round

Learn more about ICT on Wikipedia

KST to Thailand Time Difference – Complete Guide

KST runs on Korea Standard Time (KST) at UTC+09:00. Thailand runs on Indochina Time (ICT) at UTC+07:00. That puts KST 2 hours behind Thailand — a difference of -2h at the current offsets.

In practice, when it is 9:00 AM in KST it is 7:00 AM in Thailand. Midnight in KST is 10:00 PM in Thailand. Neither zone observes daylight saving time, so the offset between them stays constant all year.

KST to Thailand time conversion table

KST (KST)	Thailand (ICT)	Day
12:00 AM	10:00 PM	previous day
6:00 AM	4:00 AM	same day
7:00 AM	5:00 AM	same day
8:00 AM	6:00 AM	same day
9:00 AM	7:00 AM	same day
12:00 PM	10:00 AM	same day
3:00 PM	1:00 PM	same day
5:00 PM	3:00 PM	same day
6:00 PM	4:00 PM	same day
9:00 PM	7:00 PM	same day

Why people convert KST to Thailand time

Scheduling a call from KST to Thailand: a 10:00 AM start in KST lands at 8:00 AM in Thailand, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both KST and Thailand are inside the 9-to-5 working day between 11:00 AM and 5:00 PM KST time (9:00 AM–3:00 PM ICT). That is roughly 6 hours of usable overlap.
Watching a live event or market open: KST viewers need 7:00 AM in Thailand to catch a 9:00 AM start there, and 2:00 AM if the event is anchored to KST.

Always state the zone abbreviation, not just the hour. "3:00 PM KST" is unambiguous; "3 PM" across a -2h gap is not.
Block 11:00 AM–5:00 PM KST as the recurring meeting window if you work primarily from KST and need Thailand colleagues present.

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 ICT (Indochina Time)

Indochina Time (ICT) is used across Southeast Asia including Vietnam, Thailand, Laos, and Cambodia. Indonesia (Western time, WIB) also uses UTC+07:00. ICT does not observe daylight saving time.

Best time to call between KST and Thailand

Both KST and Thailand sit inside the 9 AM – 5 PM working day between 11:00 AM–5:00 PM KST, which is 9:00 AM–3:00 PM ICT. That gives roughly 6 hours of shared time — the safest window for a live call or meeting.

Business hours overlap

KST and Thailand share 6 hours of working-hours overlap (11:00 AM–5:00 PM KST), so scheduling a live meeting is straightforward.

KST is 2 hours behind Thailand (KST UTC+09:00 → ICT UTC+07:00). The shared working window is 11:00 AM–5:00 PM KST. Remember to re-check around daylight-saving transitions.

Learn More About Time

Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:

⏳

History of Timekeeping

From sundials to atomic clocks - 5000 years of measuring time

🌍

How Time Zones Work

UTC, offsets, and why zones don't follow straight lines

☀️

Daylight Saving Time

DST dates, which countries observe it, and the ongoing debate

Frequently Asked Questions

What is the time difference between KST and Thailand?

KST (KST, UTC+09:00) is 2 hours behind Thailand (ICT, UTC+07:00). The gap is currently -2h.

How do I convert KST time to Thailand time?

Add -2h to KST local time. For example, 9:00 AM in KST is 7:00 AM in Thailand.

What time is it in Thailand right now?

Thailand uses ICT at UTC+07:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -2h offset from KST.