JST to NZDT
+4hJST
JSTSOURCENZDT
NZDTGreen rows indicate typical business hours (9 AM - 5 PM)
JST and NZDT on the World Map
The map below highlights the JST (Japan Standard Time) and NZDT (New Zealand Daylight Time) timezone regions across the globe.
JST – Japan Standard Time
UTC+09:00Japan Standard Time (JST) is the time zone for Japan, 9 hours ahead of UTC.
- •Japan does not observe daylight saving time.
- •Tokyo is the most populous metropolitan area in the world.
- •The Tokyo Stock Exchange operates from 9:00 AM to 3:00 PM JST.
- •JST is 14 hours ahead of EST and 9 hours ahead of GMT.
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.
Comparing Time Zones: JST and NZDT
JST runs on Japan Standard Time (JST) at UTC+09:00. NZDT runs on New Zealand Daylight Time (NZDT) at UTC+13:00. That puts JST 4 hours ahead of NZDT — a difference of +4h at the current offsets.
In practice, when it is 9:00 AM in JST it is 1:00 PM in NZDT. Midnight in JST is 4:00 AM in NZDT. Neither zone observes daylight saving time, so the offset between them stays constant all year.
JST to NZDT time conversion table
| JST (JST) | NZDT (NZDT) | Day |
|---|---|---|
| 12:00 AM | 4:00 AM | same day |
| 6:00 AM | 10:00 AM | same day |
| 7:00 AM | 11:00 AM | same day |
| 8:00 AM | 12:00 PM | same day |
| 9:00 AM | 1:00 PM | same day |
| 12:00 PM | 4:00 PM | same day |
| 3:00 PM | 7:00 PM | same day |
| 5:00 PM | 9:00 PM | same day |
| 6:00 PM | 10:00 PM | same day |
| 9:00 PM | 1:00 AM | next day |
Why people convert JST to NZDT time
- Scheduling a call from JST to NZDT: a 10:00 AM start in JST lands at 2:00 PM in NZDT, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both JST and NZDT are inside the 9-to-5 working day between 9:00 AM and 1:00 PM JST time (1:00 PM–5:00 PM NZDT). That is roughly 4 hours of usable overlap.
- Coordinating a JST-based team with NZDT contacts: quoting times in the other side's local clock — not your own — removes the single biggest source of missed meetings.
- Always state the zone abbreviation, not just the hour. "3:00 PM JST" is unambiguous; "3 PM" across a +4h gap is not.
- Block 9:00 AM–1:00 PM JST as the recurring meeting window if you work primarily from JST and need NZDT colleagues present.
About JST (Japan Standard Time)
Japan Standard Time (JST) is the standard time zone for all of Japan. Japan does not observe daylight saving time. JST is 9 hours ahead of UTC and 14 hours ahead of EST. The Tokyo Stock Exchange, the world's third largest by market capitalization, operates on JST. South Korea uses the same offset (KST) but it is a distinct time zone.
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.
Best time to call between JST and NZDT
Both JST and NZDT sit inside the 9 AM – 5 PM working day between 9:00 AM–1:00 PM JST, which is 1:00 PM–5:00 PM NZDT. That gives roughly 4 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
JST and NZDT overlap for about 4 hours during the working day — enough for meetings if you avoid the edges of the window.
JST is 4 hours ahead of NZDT (JST UTC+09:00 → NZDT UTC+13:00). The shared working window is 9:00 AM–1:00 PM JST. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
JST
Does not observe DST
NZDT
☀ Currently in DST
Standard: UTC+12:00 · DST: UTC+13:00
Clocks fall back on Sat, Apr 3, 2027
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 JST and NZDT?
JST (JST, UTC+09:00) is 4 hours ahead of NZDT (NZDT, UTC+13:00). The gap is currently +4h.
How do I convert JST time to NZDT time?
Add +4h to JST local time. For example, 9:00 AM in JST is 1:00 PM in NZDT.
What time is it in NZDT right now?
NZDT uses NZDT at UTC+13:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +4h offset from JST.
What is the best time to call NZDT from JST?
Call between 9:00 AM and 1:00 PM JST — that maps to 1:00 PM–5:00 PM NZDT and keeps both parties inside the working day.
Which is ahead, JST or NZDT?
JST is 4 hours ahead of NZDT. When it is 12:00 PM in JST it is 4:00 PM in NZDT.
Does daylight saving time affect the JST–NZDT difference?
Neither zone observes daylight saving time, so the +4h offset between JST and NZDT is fixed all year.
Which other cities share JST's time zone?
JST also covers Tokyo, Osaka, Yokohama, Nagoya, Sapporo, Kyoto, Kobe, Fukuoka and 1 more.
Which countries use JST, JST's zone?
JST is used in Japan.
Is there a day difference between JST and NZDT?
Not normally. The +4h gap only pushes the date over for late-evening times.
What is the time difference between JST and NZDT?
NZDT is +4h from JST.
What timezone is JST in?
JST operates on its local timezone.
What timezone is NZDT in?
NZDT operates on its local timezone.
Which countries use JST (Japan Standard Time)?
JST is used in Japan.
Does JST observe daylight saving time?
No, JST does not observe daylight saving time and remains at UTC+09:00 year-round.
What are some interesting facts about JST?
Japan does not observe daylight saving time. Tokyo is the most populous metropolitan area in the world.
Which cities are in the NZDT timezone?
Major cities in the NZDT timezone include Auckland, Wellington, Christchurch, Hamilton, Dunedin.
What is the UTC offset for NZDT?
New Zealand Daylight Time (NZDT) is at UTC+13:00. During daylight saving time, it shifts to NZDT.
What should I know about the NZDT timezone?
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.
When is it midnight in JST, what time is it in NZDT?
When it is 12:00 AM (midnight) in JST (JST), it is +4h later in NZDT (NZDT).
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More JST time conversions
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- new york to jst
- london to jst
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- tokyo to jst
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- los angeles to jst
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- delhi to jst
- mumbai to jst
- berlin to jst
- hong kong to jst
- toronto to jst
- kathmandu to jst
See every conversion from JST →·See every conversion from NZDT →