NZST to AST Converter
AST is 17 hours behind NZDT. 9:00 AM NZDT = 4:00 PM AST (previous day).
AST is 17 hours behind NZDT at the moment. To convert NZST to AST, subtract 17 hours from the NZST time: 9:00 AM NZDT = 4:00 PM AST (previous day).
NZST (New Zealand Time) is used in New Zealand. AST (Atlantic Time) is used in Nova Scotia, New Brunswick, PEI; Puerto Rico and the Eastern Caribbean (all year).
AST here is Atlantic Standard Time, not Arabia Standard Time. NZST (New Zealand Standard Time) is not in force right now: New Zealand is currently on NZDT. This page uses whichever name applies on the date you pick, so the numbers below say NZDT.
NZST to AST time conversion table
NZST to AST on 7 Nov 2026. Today's date. Highlighted rows are 9 AM–5 PM in both places.
| NZST | AST | Day |
|---|---|---|
| 12:00 AM NZDT | 7:00 AM AST | previous day |
| 1:00 AM NZDT | 8:00 AM AST | previous day |
| 2:00 AM NZDT | 9:00 AM AST | previous day |
| 3:00 AM NZDT | 10:00 AM AST | previous day |
| 4:00 AM NZDT | 11:00 AM AST | previous day |
| 5:00 AM NZDT | 12:00 PM AST | previous day |
| 6:00 AM NZDT | 1:00 PM AST | previous day |
| 7:00 AM NZDT | 2:00 PM AST | previous day |
| 8:00 AM NZDT | 3:00 PM AST | previous day |
| 9:00 AM NZDT | 4:00 PM AST | work hours |
| 10:00 AM NZDT | 5:00 PM AST | previous day |
| 11:00 AM NZDT | 6:00 PM AST | previous day |
| 12:00 PM NZDT | 7:00 PM AST | previous day |
| 1:00 PM NZDT | 8:00 PM AST | previous day |
| 2:00 PM NZDT | 9:00 PM AST | previous day |
| 3:00 PM NZDT | 10:00 PM AST | previous day |
| 4:00 PM NZDT | 11:00 PM AST | previous day |
| 5:00 PM NZDT | 12:00 AM AST | night |
| 6:00 PM NZDT | 1:00 AM AST | night |
| 7:00 PM NZDT | 2:00 AM AST | night |
| 8:00 PM NZDT | 3:00 AM AST | night |
| 9:00 PM NZDT | 4:00 AM AST | night |
| 10:00 PM NZDT | 5:00 AM AST | night |
| 11:00 PM NZDT | 6:00 AM AST | — |
- Work rows — 9 AM–5 PM in both places
- Night in the destination (10 PM–6 AM)
How to convert NZST to AST
Subtract 17 hours from the NZST time to get AST.
Example: 9:00 AM NZDT = 4:00 PM AST (previous day).
Across midnight: 1:00 AM NZDT = 8:00 AM AST (previous day). The date changes, so always check the day as well as the hour.
Time difference between NZST and AST
The time difference between NZST and AST is not the same all year, because the two sides change for daylight saving time on different dates. In 2026 it works out like this:
- 1 Jan 2026 – 7 Mar 2026: AST is 17 hours behind of NZST.
- 8 Mar 2026 – 4 Apr 2026: AST is 16 hours behind of NZST.
- 5 Apr 2026 – 26 Sep 2026: AST is 15 hours behind of NZST.
- 27 Sep 2026 – 31 Oct 2026: AST is 16 hours behind of NZST.
- 1 Nov 2026 – 31 Dec 2026: AST is 17 hours behind of NZST.
NZST and AST during daylight saving time
- NZST next changes on 4 Apr 2027: clocks go back one hour at 02:59 local time, from NZDT (UTC+13) to NZST (UTC+12).
- AST next changes on 14 Mar 2027: clocks go forward one hour at 01:59 local time, from AST (UTC−4) to ADT (UTC−3).
Best time for a meeting between NZST and AST
NZST and AST have no shared 9 AM–5 PM window. The earliest slot that is reasonable on both sides is 7:00 AM NZDT, which is 2:00 PM AST.
NZST to AST FAQ
What is the time difference between NZST and AST?
Right now AST is 17 hours behind NZDT. The gap changes 5 times in 2026 because the two sides switch to daylight saving time on different dates.
What is 9 AM NZST in AST?
9:00 AM NZDT is 4:00 PM AST (previous day).
What is 12 PM (noon) NZST in AST?
12:00 PM NZDT is 7:00 PM AST (previous day).
Is AST ahead of or behind NZST?
AST is 17 hours behind NZDT, so it is earlier in AST than in NZST.
Does NZST change for daylight saving time?
Yes. NZST next changes on 4 Apr 2027, when clocks go back one hour from NZDT to NZST.
Does AST change for daylight saving time?
Yes. AST next changes on 14 Mar 2027, when clocks go forward one hour from AST to ADT.
What is the best time for a meeting between NZST and AST?
NZST and AST have no shared 9 AM–5 PM window. The earliest slot that is reasonable on both sides is 7:00 AM NZDT, which is 2:00 PM AST.
Related conversions
Convert AST to NZST
Convert NZST to other time zones
Convert other time zones to AST
Learn more
Updated 7 November 2026. Time zone data: IANA tz database.