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).

United Kingdom to Dublin

+0h

United Kingdom

BSTSOURCE

UTC+01:00☀ DST active

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Dublin

IST

Ireland · UTC+01:00☀ DST active

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

United Kingdom

Dublin

12:00 AM

2:00 AM

4:00 AM

6:00 AM

8:00 AM

10:00 AM

12:00 PM

2:00 PM

4:00 PM

6:00 PM

8:00 PM

10:00 PM

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

BST and IST on the World Map

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

BST Zone

→

IST 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

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

Understanding the +0h Gap: United Kingdom vs Dublin

United Kingdom runs on British Summer Time (BST) at UTC+01:00, currently observing daylight saving time. Dublin runs on Irish Standard Time (IST) at UTC+01:00, also currently on daylight saving time. That puts United Kingdom no time difference Dublin — a difference of +0h at the current offsets.

In practice, when it is 9:00 AM in United Kingdom it is 9:00 AM in Dublin. Midnight in United Kingdom is 12:00 AM in Dublin. Because both zones shift for daylight saving, the gap between them only changes during the few weeks each year when their transition dates differ.

United Kingdom to Dublin time conversion table

United Kingdom (BST)	Dublin (IST)	Day
12:00 AM	12:00 AM	same day
6:00 AM	6:00 AM	same day
7:00 AM	7:00 AM	same day
8:00 AM	8:00 AM	same day
9:00 AM	9:00 AM	same day
12:00 PM	12:00 PM	same day
3:00 PM	3:00 PM	same day
5:00 PM	5:00 PM	same day
6:00 PM	6:00 PM	same day
9:00 PM	9:00 PM	same day

Why people convert United Kingdom to Dublin time

Scheduling a call from United Kingdom to Dublin: a 10:00 AM start in United Kingdom lands at 10:00 AM in Dublin, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both United Kingdom and Dublin are inside the 9-to-5 working day between 9:00 AM and 5:00 PM BST time (9:00 AM–5:00 PM IST). That is roughly 8 hours of usable overlap.
Booking travel or deliveries: tracking Dublin local time against United Kingdom keeps pickup windows and arrival estimates honest across the +0h offset.

Always state the zone abbreviation, not just the hour. "3:00 PM BST" is unambiguous; "3 PM" across a +0h gap is not.
Block 9:00 AM–5:00 PM BST as the recurring meeting window if you work primarily from United Kingdom and need Dublin colleagues present.
United Kingdom: Clocks fall back on Sun, Oct 25, 2026. Re-check this page after that date because the offset changes and so does the +0h gap.
Dublin: Clocks fall back on Sun, Oct 25, 2026. Any meeting series spanning that date will shift by an hour in local time.

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 GMT (Greenwich Mean Time)

Best time to call between United Kingdom and Dublin

Both United Kingdom and Dublin sit inside the 9 AM – 5 PM working day between 9:00 AM–5:00 PM BST, which is 9:00 AM–5:00 PM IST. That gives roughly 8 hours of shared time — the safest window for a live call or meeting.

Business hours overlap

United Kingdom and Dublin share 8 hours of working-hours overlap (9:00 AM–5:00 PM BST), so scheduling a live meeting is straightforward.

United Kingdom is no time difference Dublin (BST UTC+01:00 → IST UTC+01:00). The shared working window is 9:00 AM–5:00 PM BST. Remember to re-check around daylight-saving transitions.

🕐 Daylight Saving Time Info

United Kingdom

☀ Currently in DST

Standard: UTC+00:00 · DST: UTC+01:00

Clocks fall back on Sun, Oct 25, 2026

Dublin

☀ Currently in DST

Standard: UTC+00:00 · DST: UTC+01:00

Clocks fall back on Sun, Oct 25, 2026

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 United Kingdom and Dublin?

United Kingdom (BST, UTC+01:00) is no time difference Dublin (IST, UTC+01:00). The gap is currently +0h.

How do I convert United Kingdom time to Dublin time?

Add +0h to United Kingdom local time. For example, 9:00 AM in United Kingdom is 9:00 AM in Dublin.

What time is it in Dublin right now?

Dublin uses IST at UTC+01:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +0h offset from United Kingdom.

What is the best time to call Dublin from United Kingdom?

Call between 9:00 AM and 5:00 PM BST — that maps to 9:00 AM–5:00 PM IST and keeps both parties inside the working day.

Which is ahead, United Kingdom or Dublin?

United Kingdom and Dublin are currently on the same clock.

Do United Kingdom and Dublin use different time zones?

United Kingdom (United Kingdom) uses BST at UTC+01:00, while Dublin (Ireland) uses IST at UTC+01:00. The IANA identifiers are Europe/London and Europe/Dublin.

Does daylight saving time affect the United Kingdom–Dublin difference?

Both zones observe DST, so the difference stays at +0h for most of the year and only changes during the weeks when their transition dates do not line up.

Which other cities share United Kingdom's time zone?

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

Which countries use BST, United Kingdom's zone?

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

What is the time difference between United Kingdom and Dublin?

Dublin is +0h from United Kingdom.

What timezone is United Kingdom in?

United Kingdom operates on its local timezone.

What timezone is Dublin in?

Dublin 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.

Which cities are in the GMT timezone?

Major cities in the GMT timezone include London, Dublin, Lisbon, Accra, Reykjavik, Edinburgh, Casablanca, Dakar.

What is the UTC offset for GMT?

Greenwich Mean Time (GMT) is at UTC+00:00. During daylight saving time, it shifts to BST.

What should I know about the GMT timezone?

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.