Hong Kong is 7 hours ahead of Dublin for most of the year: when it is 10:00 am in Dublin it is 5:00 pm in Hong Kong. In offset terms Dublin is on UTC+00:00 and Hong Kong is on UTC+08:00 in January, and UTC+01:00 and UTC+08:00 in July. The converter above works from your browser’s own time zone data, so the figure it shows is the one in force today rather than the one that was in force when this page was written.
The difference is not constant, because only one of the two cities observes daylight saving. In 2026, Dublin changes on 29 March and 25 October and Hong Kong does not change at all. That leaves 3 distinct periods in the year, and the table below gives the exact dates. It is the short windows that catch people out: a recurring call booked in one city’s clock silently moves in the other’s.
For arranging anything, the number that matters is the overlap. Dublin works 09:00 to 17:30 and Hong Kong works 09:00 to 18:00, which leaves 09:00 to 11:00 in Dublin — 16:00 to 18:00 in Hong Kong — as the window when both are open. That is 2 hours of shared working time. Both cities work Monday to Friday, so only the clock has to be reconciled.
Two local details worth knowing. Dublin keeps the same clock as London and switches on the same dates, so the two cities are never an hour apart. The exchange trades 09:30 to 16:00 with a lunch break, and UTC+08:00 has been fixed since daylight saving was dropped in 1979.
The safest way to write a time for these two cities is to give both, as in "10:00 Dublin / 17:00 Hong Kong", or to give the UTC offset. Abbreviations are the trap: Dublin is on GMT for part of the year and IST for the rest, and the same three letters are reused in other parts of the world for entirely different offsets.
The formula
local Dublin- The time you enter, on the Dublin clock
offset- Each city’s UTC offset at that moment, read live from the IANA time zone database in your browser
+7- The difference in hours that holds for most of 2026: Hong Kong is 7 hours ahead of Dublin
day shift- Whether the converted time falls on the previous, same or next calendar day in Hong Kong
How it works, step by step
- Enter a time in Dublin using the 24-hour hour box and the minute box — 15:30 is hour 15, minute 30.
- Your browser reports the UTC offset in force in Dublin and in Hong Kong for that moment, so a date near a daylight saving transition is handled correctly rather than with a fixed 7 hour rule.
- The second offset minus the first gives the difference, which is added to the time you entered. A result past midnight is marked as the next or previous day, because that is where most conversion mistakes live.
- The panel also shows the current time in both cities, the date in Hong Kong, and whether the two offices are open at the same moment.
Worked examples
09:00 in Dublin
09:00 in Dublin is 16:00 in Hong Kong — inside Hong Kong office hours. In 12-hour terms, 9:00 am against 4:00 pm. Both offices are open at that moment, so it is a slot either side can accept.
12:00 in Dublin
12:00 in Dublin is 19:00 in Hong Kong — after the Hong Kong working day has finished. In 12-hour terms, 12:00 pm against 7:00 pm. Only one of the two offices is open at that moment, so it is worth offering rather than assuming.
16:30 in Dublin
16:30 in Dublin is 23:30 in Hong Kong — late at night in Hong Kong. In 12-hour terms, 4:30 pm against 11:30 pm. Only one of the two offices is open at that moment, so it is worth offering rather than assuming.
The 1 January window, when the usual answer is wrong
Between 1 January and 28 March the difference is +08:00 rather than +07:00, because one city has changed its clocks and the other has not. In that window 10:00 in Dublin is 18:00 in Hong Kong, an hour away from where a fixed-offset table would put it.
How to read your score
Frequently asked questions
How many hours ahead of Dublin is Hong Kong?
Hong Kong is 7 hours ahead of Dublin for most of 2026, so 09:00 in Dublin is 16:00 in Hong Kong. The difference changes during the daylight saving changeovers, and the table on this page lists every period in the year with its exact dates.
What is 2 pm Dublin time in Hong Kong?
9:00 pm, after the Hong Kong working day has finished. In 24-hour form 14:00 in Dublin is 21:00 in Hong Kong, and that is outside working hours in Hong Kong.
What is the best time to call between Dublin and Hong Kong?
Anywhere between 09:00 and 11:00 Dublin time, which is 16:00 to 18:00 in Hong Kong. Both offices are open across that whole window — 2 hours of it. If you want one answer rather than a range, 10:00 in Dublin is the middle of the overlap.
Is Hong Kong ahead of or behind Dublin?
Hong Kong is ahead. Dublin is at UTC+00:00 and Hong Kong is at UTC+08:00 in mid-January, and UTC+01:00 and UTC+08:00 in mid-July. The clock moves forward going from Dublin to Hong Kong, which is why Hong Kong reaches the end of its working day first.
Do Dublin and Hong Kong change their clocks on the same date?
No. In 2026, Dublin changes on 29 March 2026 and 25 October 2026, and Hong Kong does not change its clocks at all. That is why the difference between them takes 2 different values across the year rather than one.
What do the abbreviations for Dublin mean?
Dublin is on GMT in winter and IST in summer, while Hong Kong uses HKT and HKT. Abbreviations are the least reliable way to write a time: several are ambiguous between regions, and the summer and winter forms are an hour apart. A UTC offset, or the time given in both cities, cannot be misread.
Does this converter stay correct after the clocks change?
Yes. It does not use a stored number for the difference. Each time you change a value it asks your browser for the UTC offset that Europe/Dublin and Asia/Hong_Kong are on at that moment, using the IANA time zone database that ships with your operating system, and takes the difference. The tables on this page are computed from the same database for 2026.
Dublin to Hong Kong: every hour, every period of 2026, and meeting slots
| Dublin (24h) | Dublin (12h) | Hong Kong (24h) | Hong Kong (12h) | Status |
|---|---|---|---|---|
| 00:00 | 12:00 am | 07:00 | 7:00 am | outside office hours |
| 01:00 | 1:00 am | 08:00 | 8:00 am | outside office hours |
| 02:00 | 2:00 am | 09:00 | 9:00 am | office hours in Hong Kong |
| 03:00 | 3:00 am | 10:00 | 10:00 am | office hours in Hong Kong |
| 04:00 | 4:00 am | 11:00 | 11:00 am | office hours in Hong Kong |
| 05:00 | 5:00 am | 12:00 | 12:00 pm | office hours in Hong Kong |
| 06:00 | 6:00 am | 13:00 | 1:00 pm | office hours in Hong Kong |
| 07:00 | 7:00 am | 14:00 | 2:00 pm | office hours in Hong Kong |
| 08:00 | 8:00 am | 15:00 | 3:00 pm | office hours in Hong Kong |
| 09:00 | 9:00 am | 16:00 | 4:00 pm | office hours in both |
| 10:00 | 10:00 am | 17:00 | 5:00 pm | office hours in both |
| 11:00 | 11:00 am | 18:00 | 6:00 pm | office hours in Dublin |
| 12:00 | 12:00 pm | 19:00 | 7:00 pm | office hours in Dublin |
| 13:00 | 1:00 pm | 20:00 | 8:00 pm | office hours in Dublin |
| 14:00 | 2:00 pm | 21:00 | 9:00 pm | office hours in Dublin |
| 15:00 | 3:00 pm | 22:00 | 10:00 pm | office hours in Dublin |
| 16:00 | 4:00 pm | 23:00 | 11:00 pm | office hours in Dublin |
| 17:00 | 5:00 pm | 00:00 (next day) | 12:00 am (next day) | office hours in Dublin |
| 18:00 | 6:00 pm | 01:00 (next day) | 1:00 am (next day) | outside office hours |
| 19:00 | 7:00 pm | 02:00 (next day) | 2:00 am (next day) | outside office hours |
| 20:00 | 8:00 pm | 03:00 (next day) | 3:00 am (next day) | outside office hours |
| 21:00 | 9:00 pm | 04:00 (next day) | 4:00 am (next day) | outside office hours |
| 22:00 | 10:00 pm | 05:00 (next day) | 5:00 am (next day) | outside office hours |
| 23:00 | 11:00 pm | 06:00 (next day) | 6:00 am (next day) | outside office hours |
Computed at a difference of 7 hours, which is the one that holds for most of 2026. During the transition windows in the table below, shift the right-hand columns by an hour.
| Period | Length | Dublin offset | Hong Kong offset | Difference | Abbreviations |
|---|---|---|---|---|---|
| 01 Jan to 28 Mar | 87 days | UTC+00:00 | UTC+08:00 | +8:00 | GMT / HKT |
| 29 Mar to 24 Oct | 210 days | UTC+01:00 | UTC+08:00 | +7:00 | IST / HKT |
| 25 Oct to 31 Dec | 68 days | UTC+00:00 | UTC+08:00 | +8:00 | GMT / HKT |
Every row is read from the IANA time zone database. Short periods appear where one city has changed its clocks and the other has not yet done so.
| Dublin | 12-hour | Hong Kong | Verdict |
|---|---|---|---|
| 06:00 | 6:00 am | 13:00 | Too early in Dublin |
| 06:30 | 6:30 am | 13:30 | Too early in Dublin |
| 07:00 | 7:00 am | 14:00 | Too early in Dublin |
| 07:30 | 7:30 am | 14:30 | Too early in Dublin |
| 08:00 | 8:00 am | 15:00 | Too early in Dublin |
| 08:30 | 8:30 am | 15:30 | Too early in Dublin |
| 09:00 | 9:00 am | 16:00 | Good — both offices open |
| 09:30 | 9:30 am | 16:30 | Good — both offices open |
| 10:00 | 10:00 am | 17:00 | Good — both offices open |
| 10:30 | 10:30 am | 17:30 | Good — both offices open |
| 11:00 | 11:00 am | 18:00 | After hours in Hong Kong |
| 11:30 | 11:30 am | 18:30 | After hours in Hong Kong |
| 12:00 | 12:00 pm | 19:00 | After hours in Hong Kong |
| 12:30 | 12:30 pm | 19:30 | After hours in Hong Kong |
| 13:00 | 1:00 pm | 20:00 | After hours in Hong Kong |
| 13:30 | 1:30 pm | 20:30 | After hours in Hong Kong |
| 14:00 | 2:00 pm | 21:00 | After hours in Hong Kong |
| 14:30 | 2:30 pm | 21:30 | After hours in Hong Kong |
| 15:00 | 3:00 pm | 22:00 | After hours in Hong Kong |
| 15:30 | 3:30 pm | 22:30 | After hours in Hong Kong |
| 16:00 | 4:00 pm | 23:00 | After hours in Hong Kong |
| 16:30 | 4:30 pm | 23:30 | After hours in Hong Kong |
| 17:00 | 5:00 pm | 00:00 (next day) | Too early in Hong Kong |
| 17:30 | 5:30 pm | 00:30 (next day) | Outside both |
| 18:00 | 6:00 pm | 01:00 (next day) | Outside both |
| 18:30 | 6:30 pm | 01:30 (next day) | Outside both |
| 19:00 | 7:00 pm | 02:00 (next day) | Outside both |
| 19:30 | 7:30 pm | 02:30 (next day) | Outside both |
| 20:00 | 8:00 pm | 03:00 (next day) | Outside both |
| 20:30 | 8:30 pm | 03:30 (next day) | Outside both |
| 21:00 | 9:00 pm | 04:00 (next day) | Outside both |
| 21:30 | 9:30 pm | 04:30 (next day) | Outside both |
Office hours taken as 09:00–17:30 in Dublin and 09:00–18:00 in Hong Kong, which are the customary hours in each city rather than a generic nine to five.