When it is 09:00 in Jakarta it is 13:00 in Sydney in January and 12:00 in July. Sydney is 4 hours ahead Jakarta right now — but it is not constant: the difference is 4 hours ahead in January and 3 hours ahead in July. This page gives the live times in both cities, the overlap between their working days, the daylight saving dates that move the difference, and the best meeting windows.
Try the tool: Time Zone Converter — convert any time between Jakarta and Sydney, with the offset for the date you pick.
Live times in Jakarta and Sydney
The two cities side by side. The January column uses the winter offsets (Jakarta UTC+07:00, Sydney UTC+11:00); the July column uses the summer offsets (Jakarta UTC+07:00, Sydney UTC+10:00).
| Time in Jakarta | Sydney in January | Sydney in July |
|---|---|---|
| 00:00 | 04:00 | 03:00 |
| 06:00 | 10:00 | 09:00 |
| 09:00 | 13:00 | 12:00 |
| 12:00 | 16:00 | 15:00 |
| 15:00 | 19:00 | 18:00 |
| 17:00 | 21:00 | 20:00 |
| 21:00 | 01:00 | 00:00 |
The world clock shows the current time in both cities live, and the individual city pages — time in Jakarta and time in Sydney — explain each city's time zone, offsets and daylight saving in full.
The time difference between Jakarta and Sydney
The difference is not constant. In January Sydney is 4 hours ahead Jakarta; in July it is 3 hours ahead Jakarta. The difference changes on Sunday, 5 April 2026 (from 4 hours ahead to 3 hours ahead) and Sunday, 4 October 2026 (from 3 hours ahead to 4 hours ahead) — those are the dates when one of the two cities changes its clocks and the other does not, or when they change on different days. Between those dates the difference is one value; outside them it is the other.
To convert a time, add the difference: 09:00 in Jakarta is 13:00 in Sydney in January and 12:00 in July; 17:00 in Jakarta — the end of the working day — is 21:00 in Sydney in January and 20:00 in July. To go the other way, subtract it: 09:00 in Sydney is 05:00 in Jakarta in January. The time difference calculator does the arithmetic for any date, and the UTC to Sydney page gives the full conversion table for Sydney.
Meeting overlap between Jakarta and Sydney
The overlap is the hours when both cities are in their working day (09:00–17:00 local time). The table marks the overlapping hours in Jakarta's working day and shows what time they are in Sydney.
January
| Jakarta time | Sydney time | Both working? |
|---|---|---|
| 09:00 | 13:00 | Yes |
| 10:00 | 14:00 | Yes |
| 11:00 | 15:00 | Yes |
| 12:00 | 16:00 | Yes |
| 13:00 | 17:00 | Yes |
| 14:00 | 18:00 | Yes |
| 15:00 | 19:00 | Yes |
| 16:00 | 20:00 | Yes |
July
| Jakarta time | Sydney time | Both working? |
|---|---|---|
| 09:00 | 12:00 | No |
| 10:00 | 13:00 | No |
| 11:00 | 14:00 | No |
| 12:00 | 15:00 | No |
| 13:00 | 16:00 | No |
| 14:00 | 17:00 | No |
| 15:00 | 18:00 | No |
| 16:00 | 19:00 | No |
In January the overlap is 8 hours: 09:00, 10:00, 11:00, 12:00, 13:00, 14:00, 15:00, 16:00 Jakarta time. In July it is 0 hours: there is no hour when both cities are in their working day. The meeting planner finds the overlap for any two cities and any date, and the meeting time finder finds it for a whole team.
Daylight saving in Jakarta and Sydney
Jakarta does not observe daylight saving, so its offset of UTC+07:00 never changes.
Sydney observes daylight saving: in 2026 the clocks go forward on 4 October 2026 and back on 5 April 2026, moving the offset from UTC+10:00 to UTC+11:00.
The difference changes on Sunday, 5 April 2026 and Sunday, 4 October 2026 in 2026. On those dates, one city changes its clocks and the other does not — or they change on different days — so the difference moves by an hour. A standing meeting set in one city's local time will land an hour early or late on the other side until the second city catches up. The fix is to set the calendar event in UTC, or to check the overlap again after each change. The individual DST pages — Jakarta DST 2026 and Sydney DST 2026 — give the exact dates for each city.
Best meeting windows
The best windows in January are 09:00–17:00 in Jakarta (13:00–21:00 in Sydney). These are the hours inside both working days, so nobody is up early or late. It is a short window, so keep the meeting short and send an agenda in advance.
Calling and travel notes
When it is 09:00 in Jakarta it is 13:00 in Sydney in January; when it is 12:00 in Jakarta it is 16:00 in Sydney; when it is 17:00 in Jakarta it is 21:00 in Sydney. The difference is under 12 hours, so the two cities are usually on the same date — but check the date for late-evening and early-morning times, when the date can differ by a day. Scheduling between Asia and Oceania is usually straightforward: the difference is 1–4 hours, so the working days overlap for most of the day. The main thing to watch is daylight saving in the southern hemisphere — Australia's south-eastern states and New Zealand change their clocks in October and April, the opposite of the northern hemisphere, so the difference moves twice a year.
Worked conversions
Six conversions, for January (offsets Jakarta UTC+07:00, Sydney UTC+11:00):
| Jakarta | Sydney |
|---|---|
| 08:00 | 12:00 |
| 09:00 | 13:00 |
| 12:00 | 16:00 |
| 14:00 | 18:00 |
| 17:00 | 21:00 |
| 20:00 | 00:00 |
In July, add 1 hour to each Sydney time. For the reverse direction, see Sydney to Jakarta time.
Jakarta and Sydney at a glance
| Fact | Jakarta | Sydney |
|---|---|---|
| Country | Indonesia | Australia |
| Region | Asia | Oceania |
| IANA time zone | Asia/Jakarta |
Australia/Sydney |
| Standard offset | UTC+07:00 | UTC+10:00 |
| Daylight saving offset | — does not observe | UTC+11:00 |
| Offset in January 2026 | UTC+07:00 | UTC+11:00 |
| Offset in July 2026 | UTC+07:00 | UTC+10:00 |
| Observes daylight saving | No | Yes |
The table is the whole pair in one place. The two numbers that matter most are the January and July offsets: if they are the same in both columns for a city, that city's offset never changes; if they differ, the city observes daylight saving and the difference between the cities moves with it. The individual city pages — time in Jakarta and time in Sydney — explain each city's time zone, and the DST pages — Jakarta DST 2026 and Sydney DST 2026 — give the exact change dates.
Frequently asked questions
What is the time difference between Jakarta and Sydney?
Sydney is 4 hours ahead Jakarta right now. In January the difference is 4 hours ahead and in July it is 3 hours ahead — it changes with daylight saving.
How do I schedule a recurring meeting between Jakarta and Sydney?
Pick a time inside the overlap — 09:00–17:00 Jakarta time — and set the calendar event in UTC so it moves correctly when the clocks change. Re-check the overlap in March and October, when the difference moves, and rotate the time if the meeting falls outside someone's working day.
What time is it in Sydney when it is 09:00 in Jakarta?
It is 13:00 in January and 12:00 in July. The time zone converter gives the answer for any date.
What is the best time for a meeting between Jakarta and Sydney?
The best windows in January are 09:00–17:00 Jakarta time — inside both working days.
Does the time difference between Jakarta and Sydney change during the year?
Yes. It changes on Sunday, 5 April 2026 and Sunday, 4 October 2026 in 2026, when one city changes its clocks and the other does not.
What time is it in Jakarta when it is 09:00 in Sydney?
It is 05:00 in January and 06:00 in July. See Sydney to Jakarta time for the full comparison from Sydney's side.
What are the time zones of Jakarta and Sydney?
Jakarta is in Asia/Jakarta (UTC+07:00 standard time) and Sydney is in Australia/Sydney (UTC+10:00 standard time).
What time is it in Jakarta when it is midnight in Sydney?
It is 20:00 in Jakarta in January and 21:00 in July — the same day, because Jakarta is ahead of Sydney. Midnight conversions are the ones that most often land on the wrong date, so always check the date as well as the time.
Sources
- IANA Time Zone Database, via Node.js Intl (
Intl.DateTimeFormatwithtimeZone) — offsets, daylight saving dates and local times in this article were worked out from the IANA database, not typed from memory. - TimeFlow's own time-zone data (
data/cities.ts,data/dst.ts), computed from the IANA database. - TimeFlow's time zone converter and meeting planner — the live tools behind the numbers on this page.
- Time-zone and daylight saving rules are set by governments and can change. For flights, deadlines and meetings that cannot move, confirm the time with an official source.