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).

Dublin to KST

+8h

Dublin

ISTSOURCE

Ireland · UTC+01:00☀ DST active

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

KST

UTC+09:00

HH08

MM00

20:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

Dublin

KST

12:00 AM

8:00 AM

2:00 AM

10:00 AM

4:00 AM

12:00 PM

6:00 AM

2:00 PM

8:00 AM

4:00 PM

10:00 AM

6:00 PM

12:00 PM

8:00 PM

2:00 PM

10:00 PM

4:00 PM

12:00 AM+1

6:00 PM

2:00 AM+1

8:00 PM

4:00 AM+1

10:00 PM

6:00 AM+1

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

IST and KST on the World Map

The map below highlights the IST (Greenwich Mean Time) and KST (Korea Standard Time) timezone regions across the globe.

IST Zone

→

KST Zone

Explore all world timezones interactively →

GMT – Greenwich Mean Time

UTC+00:00

Greenwich Mean Time (GMT) is the mean solar time at the Royal Observatory in Greenwich, London. It is the same as UTC+00:00.

Countries in GMT

United KingdomIrelandIcelandPortugal (mainland)GhanaSenegalMaliMauritaniaGambiaGuineaSierra LeoneLiberiaIvory CoastBurkina FasoMorocco (historically)

Major Cities in GMT

LondonDublinLisbonAccraReykjavikEdinburghCasablancaDakarBamakoAbidjanConakryFreetownMonrovia

Key Facts about GMT

•GMT is based on the Prime Meridian (0° longitude) passing through Greenwich, London.
•The Royal Observatory in Greenwich has been the reference point for GMT since 1884.
•GMT and UTC are often used interchangeably, but UTC is based on atomic clocks.
•Iceland uses GMT year-round and never observes daylight saving time.
•The UK switches from GMT to BST (British Summer Time) in late March each year.

Daylight Saving:Yes – switches to BST

Learn more about GMT on Wikipedia

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

Dublin vs KST: Offsets, DST and Best Call Times

Dublin runs on Irish Standard Time (IST) at UTC+01:00, currently observing daylight saving time. KST runs on Korea Standard Time (KST) at UTC+09:00. That puts Dublin 8 hours ahead of KST — a difference of +8h at the current offsets.

In practice, when it is 9:00 AM in Dublin it is 5:00 PM in KST. Midnight in Dublin is 8:00 AM in KST.Dublin observes daylight saving time while KST does not, so the gap narrows or widens by an hour part of the year.

Dublin to KST time conversion table

Dublin (IST)	KST (KST)	Day
12:00 AM	8:00 AM	same day
6:00 AM	2:00 PM	same day
7:00 AM	3:00 PM	same day
8:00 AM	4:00 PM	same day
9:00 AM	5:00 PM	same day
12:00 PM	8:00 PM	same day
3:00 PM	11:00 PM	same day
5:00 PM	1:00 AM	next day
6:00 PM	2:00 AM	next day
9:00 PM	5:00 AM	next day

Why people convert Dublin to KST time

Scheduling a call from Dublin to KST: a 10:00 AM start in Dublin lands at 6:00 PM in KST, so you can confirm the slot without doing the arithmetic yourself.
Handling a +8h gap: Dublin and KST 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 KST is 5:00 PM in Dublin.
Booking travel or deliveries: tracking KST local time against Dublin keeps pickup windows and arrival estimates honest across the +8h offset.

Always state the zone abbreviation, not just the hour. "3:00 PM IST" is unambiguous; "3 PM" across a +8h gap is not.
With a +8h gap there is no shared 9-to-5 window, so alternate the early start: one week Dublin takes the early slot, the next week KST does.
Dublin: Clocks fall back on Sun, Oct 25, 2026. Re-check this page after that date because the offset changes and so does the +8h gap.

About GMT (Greenwich Mean Time)

Greenwich Mean Time (GMT) is the clock time at the Royal Observatory in Greenwich, London, which sits on the Prime Meridian (0° longitude). GMT serves as the reference point from which all other time zones are calculated. The United Kingdom uses GMT during winter months and switches to British Summer Time (BST, UTC+01:00) from late March to late October. Several West African nations use GMT year-round. GMT is often used interchangeably with UTC (Coordinated Universal Time), although technically they are different – UTC is based on atomic clocks while GMT is based on Earth's rotation.

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.

Best time to call between Dublin and KST

With a +8h offset there is no overlap inside a normal 9 AM – 5 PM day. KST opens at 9:00 AM KST, which is 5:00 PM in Dublin, so real-time calls need an early-morning or late-evening slot on one side.

Business hours overlap

Dublin and KST have no shared working hours because of the +8h gap. Teams need to alternate early starts or rely on asynchronous handovers.

Dublin is 8 hours ahead of KST (IST UTC+01:00 → KST 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

Dublin

☀ Currently in DST

Standard: UTC+00:00 · DST: UTC+01:00

Clocks fall back on Sun, Oct 25, 2026

KST

Does not observe DST

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 Dublin and KST?

Dublin (IST, UTC+01:00) is 8 hours ahead of KST (KST, UTC+09:00). The gap is currently +8h.

How do I convert Dublin time to KST time?

Add +8h to Dublin local time. For example, 9:00 AM in Dublin is 5:00 PM in KST.

What time is it in KST right now?

KST uses KST at UTC+09:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +8h offset from Dublin.

What is the best time to call KST from Dublin?

There is no shared working-hours window because of the +8h gap. The closest option is 1:00 PM in Dublin, which is 9:00 PM in KST.

Which is ahead, Dublin or KST?

Dublin is 8 hours ahead of KST. When it is 12:00 PM in Dublin it is 8:00 PM in KST.

Do Dublin and KST use different time zones?

Dublin (Ireland) uses IST at UTC+01:00, while KST uses KST at UTC+09:00. The IANA identifiers are Europe/Dublin and Asia/Seoul.

Does daylight saving time affect the Dublin–KST difference?

Yes at the moment: Dublin is on daylight saving time and KST is not, so the +8h gap shifts by an hour when exactly one of them changes clocks.

Which other cities share Dublin's time zone?

IST also covers London, Dublin, Lisbon, Accra, Reykjavik, Edinburgh, Casablanca, Dakar and 5 more.

Which countries use IST, Dublin's zone?

IST is used in United Kingdom, Ireland, Iceland, Portugal (mainland), Ghana, Senegal, Mali, Mauritania and 7 more.

Is there a day difference between Dublin and KST?

Not normally. The +8h gap only pushes the date over for late-evening times.

What is the time difference between Dublin and KST?

KST is +8h from Dublin.

What timezone is Dublin in?

Dublin operates on its local timezone.

What timezone is KST in?

KST operates on its local timezone.

Which countries use GMT (Greenwich Mean Time)?

GMT is used in United Kingdom, Ireland, Iceland, Portugal (mainland), Ghana, Senegal, and 9 more countries.

Does GMT observe daylight saving time?

Yes, GMT switches to BST during summer months.

What are some interesting facts about GMT?

GMT is based on the Prime Meridian (0° longitude) passing through Greenwich, London. The Royal Observatory in Greenwich has been the reference point for GMT since 1884.