ACST to NZST
+2h 30mACST
ACSTSOURCENZST
NZSTGreen rows indicate typical business hours (9 AM - 5 PM)
ACST and NZST on the World Map
The map below highlights the ACST (Australian Central Standard Time) and NZST (New Zealand Standard Time) timezone regions across the globe.
ACST – Australian Central Standard Time
UTC+09:30Australian Central Standard Time (ACST, UTC+09:30) covers South Australia and the Northern Territory, on a half-hour offset.
- •ACST uses a half-hour offset: UTC+09:30.
- •South Australia moves to ACDT (UTC+10:30) in summer; the Northern Territory does not.
- •Adelaide and Darwin are 30 minutes apart during daylight saving, level in winter.
- •Adelaide is one of the few major cities on a 30-minute offset.
NZST – New Zealand Standard Time
UTC+12:00New Zealand Standard Time (NZST) is the time zone for New Zealand, 12 hours ahead of UTC.
- •New Zealand is among the first major countries to see a new day.
- •NZST is 17 hours ahead of EST.
- •New Zealand observes DST from September to April (Southern Hemisphere summer).
ACST vs NZST: Offsets, DST and Best Call Times
ACST runs on Australian Central Standard Time (ACST) at UTC+09:30. NZST runs on New Zealand Standard Time (NZST) at UTC+12:00. That puts ACST 2 hours 30 minutes ahead of NZST — a difference of +2h 30m at the current offsets.
In practice, when it is 9:00 AM in ACST it is 11:30 AM in NZST. Midnight in ACST is 2:30 AM in NZST. Neither zone observes daylight saving time, so the offset between them stays constant all year.
ACST to NZST time conversion table
| ACST (ACST) | NZST (NZST) | Day |
|---|---|---|
| 12:00 AM | 2:30 AM | same day |
| 6:00 AM | 8:30 AM | same day |
| 7:00 AM | 9:30 AM | same day |
| 8:00 AM | 10:30 AM | same day |
| 9:00 AM | 11:30 AM | same day |
| 12:00 PM | 2:30 PM | same day |
| 3:00 PM | 5:30 PM | same day |
| 5:00 PM | 7:30 PM | same day |
| 6:00 PM | 8:30 PM | same day |
| 9:00 PM | 11:30 PM | same day |
Why people convert ACST to NZST time
- Scheduling a call from ACST to NZST: a 10:00 AM start in ACST lands at 12:30 PM in NZST, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both ACST and NZST are inside the 9-to-5 working day between 9:00 AM and 2:30 PM ACST time (11:30 AM–5:00 PM NZST). That is roughly 5 hours 30 minutes of usable overlap.
- Booking travel or deliveries: tracking NZST local time against ACST keeps pickup windows and arrival estimates honest across the +2h 30m offset.
- Always state the zone abbreviation, not just the hour. "3:00 PM ACST" is unambiguous; "3 PM" across a +2h 30m gap is not.
- Block 9:00 AM–2:30 PM ACST as the recurring meeting window if you work primarily from ACST and need NZST colleagues present.
About ACST (Australian Central Standard Time)
Australian Central Standard Time (ACST) is the half-hour offset of UTC+09:30 used across South Australia and the Northern Territory, taking in Adelaide and Darwin. South Australia moves to Australian Central Daylight Time (ACDT, UTC+10:30) from the first Sunday in October to the first Sunday in April, but the Northern Territory does not observe daylight saving — so Adelaide and Darwin sit 30 minutes apart in summer and level with each other in winter. The half-hour offset means Adelaide is 30 minutes behind Sydney in winter and level with it during daylight saving, which regularly catches out travellers and meeting planners.
About NZST (New Zealand Standard Time)
New Zealand Standard Time (NZST) is the standard time zone for New Zealand and its dependencies. New Zealand is among the first countries to see a new calendar day. During summer (September to April), clocks advance to New Zealand Daylight Time (NZDT, UTC+13:00).
Best time to call between ACST and NZST
Both ACST and NZST sit inside the 9 AM – 5 PM working day between 9:00 AM–2:30 PM ACST, which is 11:30 AM–5:00 PM NZST. That gives roughly 5 hours and 30 minutes of shared time — the safest window for a live call or meeting.
Business hours overlap
ACST and NZST share 5 hours of working-hours overlap (9:00 AM–2:30 PM ACST), so scheduling a live meeting is straightforward.
ACST is 2 hours 30 minutes ahead of NZST (ACST UTC+09:30 → NZST UTC+12:00). The shared working window is 9:00 AM–2:30 PM ACST. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
ACST
❄ Currently in Standard Time
Standard: UTC+09:30 · DST: UTC+10:30
Clocks spring forward on Sat, Oct 3, 2026
NZST
☀ Currently in DST
Standard: UTC+12:00 · DST: UTC+13:00
Clocks fall back on Sat, Apr 3, 2027
⚠ These locations are currently in different DST states, so the time difference may change when clocks adjust.
Learn More About Time
Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:
Frequently Asked Questions
What is the time difference between ACST and NZST?
ACST (ACST, UTC+09:30) is 2 hours 30 minutes ahead of NZST (NZST, UTC+12:00). The gap is currently +2h 30m.
How do I convert ACST time to NZST time?
Add +2h 30m to ACST local time. For example, 9:00 AM in ACST is 11:30 AM in NZST.
What time is it in NZST right now?
NZST uses NZST at UTC+12:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +2h 30m offset from ACST.
What is the best time to call NZST from ACST?
Call between 9:00 AM and 2:30 PM ACST — that maps to 11:30 AM–5:00 PM NZST and keeps both parties inside the working day.
Which is ahead, ACST or NZST?
ACST is 2 hours 30 minutes ahead of NZST. When it is 12:00 PM in ACST it is 2:30 PM in NZST.
Does daylight saving time affect the ACST–NZST difference?
Neither zone observes daylight saving time, so the +2h 30m offset between ACST and NZST is fixed all year.
Which other cities share ACST's time zone?
ACST also covers Adelaide, Darwin, Alice Springs, Mount Gambier.
Which countries use ACST, ACST's zone?
ACST is used in Australia (South Australia, Northern Territory).
Is there a day difference between ACST and NZST?
Not normally. The +2h 30m gap only pushes the date over for late-evening times.
What is the time difference between ACST and NZST?
NZST is +2h 30m from ACST.
What timezone is ACST in?
ACST operates on its local timezone.
What timezone is NZST in?
NZST operates on its local timezone.
Which countries use ACST (Australian Central Standard Time)?
ACST is used in Australia (South Australia, Northern Territory).
Does ACST observe daylight saving time?
Yes, ACST switches to ACDT during summer months.
What are some interesting facts about ACST?
ACST uses a half-hour offset: UTC+09:30. South Australia moves to ACDT (UTC+10:30) in summer; the Northern Territory does not.
Which cities are in the NZST timezone?
Major cities in the NZST timezone include Auckland, Wellington, Christchurch, Hamilton, Dunedin.
What is the UTC offset for NZST?
New Zealand Standard Time (NZST) is at UTC+12:00. During daylight saving time, it shifts to NZDT.
What should I know about the NZST timezone?
New Zealand is among the first major countries to see a new day. NZST is 17 hours ahead of EST.
When is it midnight in ACST, what time is it in NZST?
When it is 12:00 AM (midnight) in ACST (ACST), it is +2h 30m later in NZST (NZST).
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See every conversion from ACST →·See every conversion from NZST →