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 PDT

-8h

Dublin

ISTSOURCE

Ireland · UTC+01:00☀ DST active

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

PDT

UTC-07:00☀ DST active

HH04

MM00

04:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

Dublin

PDT

12:00 AM

4:00 PM-1

2:00 AM

6:00 PM-1

4:00 AM

8:00 PM-1

6:00 AM

10:00 PM-1

8:00 AM

12:00 AM

10:00 AM

2:00 AM

12:00 PM

4:00 AM

2:00 PM

6:00 AM

4:00 PM

8:00 AM

6:00 PM

10:00 AM

8:00 PM

12:00 PM

10:00 PM

2:00 PM

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

IST and PDT on the World Map

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

IST Zone

→

PDT 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

PDT – Pacific Daylight Time

UTC-07:00

Pacific Daylight Time (PDT) is the daylight saving offset on the US/Canada Pacific coast, 7 hours behind UTC.

Countries in PDT

United States (Pacific)Canada (British Columbia)Mexico (Baja California)

Major Cities in PDT

Los AngelesSan FranciscoSeattleVancouverPortland

Key Facts about PDT

•PDT aligns with MST at UTC-07:00.
•Tech company earnings calls often reference PDT/PST times.

Daylight Saving:Yes – switches to PST

Learn more about PDT on Wikipedia

Understanding the -8h Gap: Dublin vs PDT

Dublin runs on Irish Standard Time (IST) at UTC+01:00, currently observing daylight saving time. PDT runs on Pacific Daylight Time (PDT) at UTC-07:00. That puts Dublin 8 hours behind PDT — a difference of -8h at the current offsets.

In practice, when it is 9:00 AM in Dublin it is 1:00 AM in PDT. Midnight in Dublin is 4:00 PM in PDT.Dublin observes daylight saving time while PDT does not, so the gap narrows or widens by an hour part of the year.

Dublin to PDT time conversion table

Dublin (IST)	PDT (PDT)	Day
12:00 AM	4:00 PM	previous day
6:00 AM	10:00 PM	previous day
7:00 AM	11:00 PM	previous day
8:00 AM	12:00 AM	same day
9:00 AM	1:00 AM	same day
12:00 PM	4:00 AM	same day
3:00 PM	7:00 AM	same day
5:00 PM	9:00 AM	same day
6:00 PM	10:00 AM	same day
9:00 PM	1:00 PM	same day

Why people convert Dublin to PDT time

Scheduling a call from Dublin to PDT: a 10:00 AM start in Dublin lands at 2:00 AM in PDT, so you can confirm the slot without doing the arithmetic yourself.
Handling a -8h gap: Dublin and PDT 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 PDT is 1:00 AM in Dublin.
Coordinating a Dublin-based team with PDT 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 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 PDT 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 PDT (Pacific Daylight Time)

Pacific Daylight Time (PDT) is observed from March to November on the Pacific coast. During PDT, the west coast is 7 hours behind UTC and only 2 hours behind the east coast's EDT.

Best time to call between Dublin and PDT

With a -8h offset there is no overlap inside a normal 9 AM – 5 PM day. PDT opens at 9:00 AM PDT, which is 1:00 AM in Dublin, so real-time calls need an early-morning or late-evening slot on one side.

Business hours overlap

Dublin and PDT 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 behind PDT (IST UTC+01:00 → PDT UTC-07:00). 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

PDT

☀ Currently in DST

Standard: UTC-08:00 · DST: UTC-07:00

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:

⏳

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 PDT?

Dublin (IST, UTC+01:00) is 8 hours behind PDT (PDT, UTC-07:00). The gap is currently -8h.

How do I convert Dublin time to PDT time?

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

What time is it in PDT right now?

PDT uses PDT at UTC-07:00. 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 PDT 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 5:00 AM in PDT.

Which is behind, Dublin or PDT?

Dublin is 8 hours behind PDT. When it is 12:00 PM in Dublin it is 4:00 AM in PDT.

Do Dublin and PDT use different time zones?

Dublin (Ireland) uses IST at UTC+01:00, while PDT uses PDT at UTC-07:00. The IANA identifiers are Europe/Dublin and America/Los_Angeles.

Does daylight saving time affect the Dublin–PDT difference?

Yes at the moment: Dublin is on daylight saving time and PDT 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 PDT?

Not normally. The -8h gap only pushes the date over the previous day.

What is the time difference between Dublin and PDT?

PDT is -8h from Dublin.

What timezone is Dublin in?

Dublin operates on its local timezone.

What timezone is PDT in?

PDT 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.