Does it handle Daylight Saving Time?

Yes, the tool automatically adjusts for Daylight Saving Time based on the specific date you select, ensuring accurate conversions year-round.

Can I add multiple cities?

Yes, you can add as many cities as you need to the dashboard to compare times across your entire global network simultaneously.

Dublin to GMT

-1h

Dublin

ISTSOURCE

Ireland · UTC+01:00☀ DST active

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

GMT

UTC+01:00☀ DST active

HH11

MM00

11:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

Dublin

GMT

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)

IST and GMT on the World Map

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

IST Zone

→

GMT 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

Dublin vs GMT: Offsets, DST and Best Call Times

Dublin runs on Irish Standard Time (IST) at UTC+01:00, currently observing daylight saving time. GMT runs on Greenwich Mean Time (GMT) at UTC+00:00. That puts Dublin 1 hour behind GMT — a difference of -1h at the current offsets.

In practice, when it is 9:00 AM in Dublin it is 8:00 AM in GMT. Midnight in Dublin is 11:00 PM in GMT.Dublin observes daylight saving time while GMT does not, so the gap narrows or widens by an hour part of the year.

Dublin to GMT time conversion table

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

Why people convert Dublin to GMT time

Scheduling a call from Dublin to GMT: a 10:00 AM start in Dublin lands at 9:00 AM in GMT, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both Dublin and GMT are inside the 9-to-5 working day between 10:00 AM and 5:00 PM IST time (9:00 AM–4:00 PM GMT). That is roughly 7 hours of usable overlap.
Watching a live event or market open: Dublin viewers need 8:00 AM in GMT to catch a 9:00 AM start there, and 1:00 AM if the event is anchored to Dublin.

Always state the zone abbreviation, not just the hour. "3:00 PM IST" is unambiguous; "3 PM" across a -1h gap is not.
Block 10:00 AM–5:00 PM IST as the recurring meeting window if you work primarily from Dublin and need GMT colleagues present.
Dublin: Clocks fall back on Sun, Oct 25, 2026. Re-check this page after that date because the offset changes and so does the -1h 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 GMT (Greenwich Mean Time)

Best time to call between Dublin and GMT

Both Dublin and GMT sit inside the 9 AM – 5 PM working day between 10:00 AM–5:00 PM IST, which is 9:00 AM–4:00 PM GMT. That gives roughly 7 hours of shared time — the safest window for a live call or meeting.

Business hours overlap

Dublin and GMT share 7 hours of working-hours overlap (10:00 AM–5:00 PM IST), so scheduling a live meeting is straightforward.

Dublin is 1 hour behind GMT (IST UTC+01:00 → GMT UTC+00:00). The shared working window is 10:00 AM–5:00 PM IST. 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

GMT

☀ 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 Dublin and GMT?

Dublin (IST, UTC+01:00) is 1 hour behind GMT (GMT, UTC+00:00). The gap is currently -1h.

How do I convert Dublin time to GMT time?

Add -1h to Dublin local time. For example, 9:00 AM in Dublin is 8:00 AM in GMT.

What time is it in GMT right now?

GMT uses GMT at UTC+00:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -1h offset from Dublin.

What is the best time to call GMT from Dublin?

Call between 10:00 AM and 5:00 PM IST — that maps to 9:00 AM–4:00 PM GMT and keeps both parties inside the working day.

Which is behind, Dublin or GMT?

Dublin is 1 hour behind GMT. When it is 12:00 PM in Dublin it is 11:00 AM in GMT.

Do Dublin and GMT use different time zones?

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

Does daylight saving time affect the Dublin–GMT difference?

Yes at the moment: Dublin is on daylight saving time and GMT is not, so the -1h 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 GMT?

Not normally. The -1h gap only pushes the date over the previous day.

What is the time difference between Dublin and GMT?

GMT is -1h from Dublin.

What timezone is Dublin in?

Dublin operates on its local timezone.

What timezone is GMT in?

GMT 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.