NZDT to HST
-23hNZDT
NZDTSOURCEHST
HSTGreen rows indicate typical business hours (9 AM - 5 PM)
NZDT and HST on the World Map
The map below highlights the NZDT (New Zealand Daylight Time) and HST (Hawaii Standard Time) timezone regions across the globe.
NZDT – New Zealand Daylight Time
UTC+13:00New Zealand Daylight Time (NZDT, UTC+13:00) is New Zealand's summer time zone, one of the earliest offsets in the world.
- •NZDT runs from the last Sunday in September to the first Sunday in April.
- •NZDT is UTC+13:00 — one of the earliest time offsets used anywhere.
- •New Zealand changes its clocks two to three weeks before Australia.
- •The Chatham Islands observe UTC+13:45 during their summer time.
HST – Hawaii Standard Time
UTC-10:00Hawaii Standard Time (HST) is the time zone for the Hawaiian Islands, 10 hours behind UTC.
- •Hawaii does not observe daylight saving time.
- •HST is 5 hours behind EST in winter and 6 hours behind EDT in summer.
- •Hawaii is one of only two US states that don't observe DST (the other is Arizona).
Comparing Time Zones: NZDT and HST
NZDT runs on New Zealand Daylight Time (NZDT) at UTC+13:00. HST runs on Hawaii Standard Time (HST) at UTC-10:00. That puts NZDT 23 hours behind HST — a difference of -23h at the current offsets.
In practice, when it is 9:00 AM in NZDT it is 10:00 AM in HST on the previous day. Midnight in NZDT is 1:00 AM in HST. Neither zone observes daylight saving time, so the offset between them stays constant all year.
NZDT to HST time conversion table
| NZDT (NZDT) | HST (HST) | Day |
|---|---|---|
| 12:00 AM | 1:00 AM | previous day |
| 6:00 AM | 7:00 AM | previous day |
| 7:00 AM | 8:00 AM | previous day |
| 8:00 AM | 9:00 AM | previous day |
| 9:00 AM | 10:00 AM | previous day |
| 12:00 PM | 1:00 PM | previous day |
| 3:00 PM | 4:00 PM | previous day |
| 5:00 PM | 6:00 PM | previous day |
| 6:00 PM | 7:00 PM | previous day |
| 9:00 PM | 10:00 PM | previous day |
Why people convert NZDT to HST time
- Scheduling a call from NZDT to HST: a 10:00 AM start in NZDT lands at 11:00 AM in HST the previous day, so you can confirm the slot without doing the arithmetic yourself.
- Handling a -23h gap: NZDT and HST have no overlap inside a normal 9-to-5 day, so real-time meetings need an early-morning or late-evening slot on one side. 9:00 AM in HST is 10:00 AM in NZDT.
- Keeping family and friends in sync: knowing that 8:00 PM in NZDT is 9:00 PM in HST makes it easy to avoid calling at 3 AM.
- Always state the zone abbreviation, not just the hour. "3:00 PM NZDT" is unambiguous; "3 PM" across a -23h gap is not.
- With a -23h gap there is no shared 9-to-5 window, so alternate the early start: one week NZDT takes the early slot, the next week HST does.
About NZDT (New Zealand Daylight Time)
New Zealand Daylight Time (NZDT) is the summer time zone for New Zealand, one hour ahead of New Zealand Standard Time (NZST, UTC+12:00). It runs from the last Sunday in September to the first Sunday in April, so New Zealand shifts a week or two earlier in spring than Australia. At UTC+13:00, NZDT is among the earliest offsets in the world — only Samoa, Tonga and parts of Kiribati run further ahead at certain times of year. Auckland and Wellington are 13 hours ahead of UTC during NZDT, 12 hours ahead of Sydney, and 18 hours ahead of New York. The Chatham Islands, 45 minutes further east, move to UTC+13:45.
About HST (Hawaii Standard Time)
Hawaii Standard Time (HST) is used in the state of Hawaii and does not observe daylight saving time. This makes HST one of the most consistent time zones in the US. The Hawaiian Islands are among the last places on Earth to see a new calendar day.
Best time to call between NZDT and HST
With a -23h offset there is no overlap inside a normal 9 AM – 5 PM day. HST opens at 9:00 AM HST, which is 10:00 AM in NZDT, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
NZDT and HST have no shared working hours because of the -23h gap. Teams need to alternate early starts or rely on asynchronous handovers.
NZDT is 23 hours behind HST (NZDT UTC+13:00 → HST UTC-10:00). There is no shared 9-to-5 window, so plan around an early or late slot. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
NZDT
☀ Currently in DST
Standard: UTC+12:00 · DST: UTC+13:00
Clocks fall back on Sat, Apr 3, 2027
HST
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:
Frequently Asked Questions
What is the time difference between NZDT and HST?
NZDT (NZDT, UTC+13:00) is 23 hours behind HST (HST, UTC-10:00). The gap is currently -23h.
How do I convert NZDT time to HST time?
Add -23h to NZDT local time. For example, 9:00 AM in NZDT is 10:00 AM in HST (previous day).
What time is it in HST right now?
HST uses HST at UTC-10:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -23h offset from NZDT.
What is the best time to call HST from NZDT?
There is no shared working-hours window because of the -23h gap. The closest option is 1:00 PM in NZDT, which is 2:00 PM in HST.
Which is behind, NZDT or HST?
NZDT is 23 hours behind HST. When it is 12:00 PM in NZDT it is 1:00 PM in HST.
Does daylight saving time affect the NZDT–HST difference?
Neither zone observes daylight saving time, so the -23h offset between NZDT and HST is fixed all year.
Which other cities share NZDT's time zone?
NZDT also covers Auckland, Wellington, Christchurch, Hamilton, Dunedin.
Which countries use NZDT, NZDT's zone?
NZDT is used in New Zealand.
Is there a day difference between NZDT and HST?
Sometimes. The -23h gap is large enough that 8:00 PM or later in NZDT already falls on the previous day in HST.
What is the time difference between NZDT and HST?
HST is -23h from NZDT.
What timezone is NZDT in?
NZDT operates on its local timezone.
What timezone is HST in?
HST operates on its local timezone.
Which countries use NZDT (New Zealand Daylight Time)?
NZDT is used in New Zealand.
Does NZDT observe daylight saving time?
Yes, NZDT switches to NZDT during summer months.
What are some interesting facts about NZDT?
NZDT runs from the last Sunday in September to the first Sunday in April. NZDT is UTC+13:00 — one of the earliest time offsets used anywhere.
Which cities are in the HST timezone?
Major cities in the HST timezone include Honolulu, Hilo, Kailua, Pearl City, Kapolei.
What is the UTC offset for HST?
Hawaii Standard Time (HST) is at UTC-10:00.
What should I know about the HST timezone?
Hawaii does not observe daylight saving time. HST is 5 hours behind EST in winter and 6 hours behind EDT in summer.
When is it midnight in NZDT, what time is it in HST?
When it is 12:00 AM (midnight) in NZDT (NZDT), it is -23h later in HST (HST).
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- singapore to nzdt
- sydney to nzdt
- los angeles to nzdt
- paris to nzdt
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- mumbai to nzdt
- berlin to nzdt
- hong kong to nzdt
- toronto to nzdt
- kathmandu to nzdt
See every conversion from NZDT →·See every conversion from HST →