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).

Ireland to HKT

+7h

Ireland

ISTSOURCE

UTC+01:00☀ DST active

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

HKT

UTC+08:00

HH07

MM00

19:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

Ireland

HKT

12:00 AM

7:00 AM

2:00 AM

9:00 AM

4:00 AM

11:00 AM

6:00 AM

1:00 PM

8:00 AM

3:00 PM

10:00 AM

5:00 PM

12:00 PM

7:00 PM

2:00 PM

9:00 PM

4:00 PM

11:00 PM

6:00 PM

1:00 AM+1

8:00 PM

3:00 AM+1

10:00 PM

5:00 AM+1

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

IST and HKT on the World Map

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

IST Zone

→

HKT 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

HKT – Hong Kong Time

UTC+08:00

Hong Kong Time (HKT, UTC+08:00) is the time zone for Hong Kong, 8 hours ahead of UTC.

Countries in HKT

Hong Kong SAR

Major Cities in HKT

Hong KongKowloonTsuen WanSha Tin

Key Facts about HKT

•Hong Kong does not observe daylight saving time and has kept UTC+08:00 since 1979.
•HKT shares its offset with China Standard Time, Singapore Time and Philippine Time.
•The Hong Kong Stock Exchange opens at 09:30 HKT.
•Hong Kong Time does not change with the seasons, so its gap to other zones is fixed.

Daylight Saving:No – UTC+08:00 year-round

Learn more about HKT on Wikipedia

Time Conversion Guide: Ireland to HKT

Ireland runs on Irish Standard Time (IST) at UTC+01:00, currently observing daylight saving time. HKT runs on Hong Kong Time (HKT) at UTC+08:00. That puts Ireland 7 hours ahead of HKT — a difference of +7h at the current offsets.

In practice, when it is 9:00 AM in Ireland it is 4:00 PM in HKT. Midnight in Ireland is 7:00 AM in HKT.Ireland observes daylight saving time while HKT does not, so the gap narrows or widens by an hour part of the year.

Ireland to HKT time conversion table

Ireland (IST)	HKT (HKT)	Day
12:00 AM	7:00 AM	same day
6:00 AM	1:00 PM	same day
7:00 AM	2:00 PM	same day
8:00 AM	3:00 PM	same day
9:00 AM	4:00 PM	same day
12:00 PM	7:00 PM	same day
3:00 PM	10:00 PM	same day
5:00 PM	12:00 AM	next day
6:00 PM	1:00 AM	next day
9:00 PM	4:00 AM	next day

Why people convert Ireland to HKT time

Scheduling a call from Ireland to HKT: a 10:00 AM start in Ireland lands at 5:00 PM in HKT, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both Ireland and HKT are inside the 9-to-5 working day between 9:00 AM and 10:00 AM IST time (4:00 PM–5:00 PM HKT). That is roughly 1 hours of usable overlap.
Keeping family and friends in sync: knowing that 8:00 PM in Ireland is 3:00 AM in HKT makes it easy to avoid calling at 3 AM.

Always state the zone abbreviation, not just the hour. "3:00 PM IST" is unambiguous; "3 PM" across a +7h gap is not.
Block 9:00 AM–10:00 AM IST as the recurring meeting window if you work primarily from Ireland and need HKT colleagues present.
Ireland: Clocks fall back on Sun, Oct 25, 2026. Re-check this page after that date because the offset changes and so does the +7h 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 HKT (Hong Kong Time)

Hong Kong Time (HKT) is fixed at UTC+08:00 all year and does not observe daylight saving time. Hong Kong last used summer time in 1979 and has kept a single offset since. HKT shares the UTC+08:00 offset with China Standard Time, Singapore Time, Malaysian Time, Philippine Time and Australian Western Standard Time, but is listed separately because Hong Kong maintains its own timekeeping authority. As a major financial centre, Hong Kong's trading hours set the rhythm for markets across Asia, opening at 09:30 HKT which is 01:30 in London and 20:30 the previous evening in New York.

Best time to call between Ireland and HKT

Both Ireland and HKT sit inside the 9 AM – 5 PM working day between 9:00 AM–10:00 AM IST, which is 4:00 PM–5:00 PM HKT. That gives roughly 1 hours of shared time — the safest window for a live call or meeting.

Business hours overlap

Ireland and HKT overlap for only 60 minutes (9:00 AM–10:00 AM IST), so meetings have to be booked precisely.

Ireland is 7 hours ahead of HKT (IST UTC+01:00 → HKT UTC+08:00). The shared working window is 9:00 AM–10:00 AM IST. Remember to re-check around daylight-saving transitions.

🕐 Daylight Saving Time Info

Ireland

☀ Currently in DST

Standard: UTC+00:00 · DST: UTC+01:00

Clocks fall back on Sun, Oct 25, 2026

HKT

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 Ireland and HKT?

Ireland (IST, UTC+01:00) is 7 hours ahead of HKT (HKT, UTC+08:00). The gap is currently +7h.

How do I convert Ireland time to HKT time?

Add +7h to Ireland local time. For example, 9:00 AM in Ireland is 4:00 PM in HKT.

What time is it in HKT right now?

HKT uses HKT at UTC+08:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +7h offset from Ireland.

What is the best time to call HKT from Ireland?

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

Which is ahead, Ireland or HKT?

Ireland is 7 hours ahead of HKT. When it is 12:00 PM in Ireland it is 7:00 PM in HKT.

Do Ireland and HKT use different time zones?

Ireland (Ireland) uses IST at UTC+01:00, while HKT uses HKT at UTC+08:00. The IANA identifiers are Europe/Dublin and Asia/Hong_Kong.

Does daylight saving time affect the Ireland–HKT difference?

Yes at the moment: Ireland is on daylight saving time and HKT is not, so the +7h gap shifts by an hour when exactly one of them changes clocks.

Which other cities share Ireland's time zone?

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

Which countries use IST, Ireland'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 Ireland and HKT?

Not normally. The +7h gap only pushes the date over for late-evening times.

What is the time difference between Ireland and HKT?

HKT is +7h from Ireland.

What timezone is Ireland in?

Ireland operates on its local timezone.

What timezone is HKT in?

HKT 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 HKT timezone?

Major cities in the HKT timezone include Hong Kong, Kowloon, Tsuen Wan, Sha Tin.

What is the UTC offset for HKT?

Hong Kong Time (HKT) is at UTC+08:00.

What should I know about the HKT timezone?

Hong Kong does not observe daylight saving time and has kept UTC+08:00 since 1979. HKT shares its offset with China Standard Time, Singapore Time and Philippine Time.