MST to NZDT
+20hMST
MSTSOURCENZDT
NZDTGreen rows indicate typical business hours (9 AM - 5 PM)
MST and NZDT on the World Map
The map below highlights the MST (Mountain Standard Time) and NZDT (New Zealand Daylight Time) timezone regions across the globe.
MST – Mountain Standard Time
UTC-07:00Mountain Standard Time (MST) is the time zone for the Mountain region of North America, 7 hours behind UTC.
- •Arizona does not observe daylight saving time, staying on MST year-round.
- •The Navajo Nation in Arizona does observe DST, unlike the rest of the state.
- •Denver, the 'Mile High City', is the largest city fully in MST.
- •MST covers 6 US states entirely and parts of several others.
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.
MST vs NZDT: Offsets, DST and Best Call Times
MST runs on Mountain Standard Time (MST) at UTC-07:00. NZDT runs on New Zealand Daylight Time (NZDT) at UTC+13:00. That puts MST 20 hours ahead of NZDT — a difference of +20h at the current offsets.
In practice, when it is 9:00 AM in MST it is 5:00 AM in NZDT on the next day. Midnight in MST is 8:00 PM in NZDT. Neither zone observes daylight saving time, so the offset between them stays constant all year.
MST to NZDT time conversion table
| MST (MST) | NZDT (NZDT) | Day |
|---|---|---|
| 12:00 AM | 8:00 PM | same day |
| 6:00 AM | 2:00 AM | next day |
| 7:00 AM | 3:00 AM | next day |
| 8:00 AM | 4:00 AM | next day |
| 9:00 AM | 5:00 AM | next day |
| 12:00 PM | 8:00 AM | next day |
| 3:00 PM | 11:00 AM | next day |
| 5:00 PM | 1:00 PM | next day |
| 6:00 PM | 2:00 PM | next day |
| 9:00 PM | 5:00 PM | next day |
Why people convert MST to NZDT time
- Scheduling a call from MST to NZDT: a 10:00 AM start in MST lands at 6:00 AM in NZDT the next day, so you can confirm the slot without doing the arithmetic yourself.
- Handling a +20h gap: MST and NZDT 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 NZDT is 5:00 AM in MST.
- Coordinating a MST-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 MST" is unambiguous; "3 PM" across a +20h gap is not.
- With a +20h gap there is no shared 9-to-5 window, so alternate the early start: one week MST takes the early slot, the next week NZDT does.
About MST (Mountain Standard Time)
Mountain Standard Time (MST) covers the Rocky Mountain region of the United States and Canada. Arizona is notable for not observing daylight saving time, staying on MST year-round (except the Navajo Nation). The time zone includes major cities like Denver, Phoenix, Calgary, and Salt Lake City. During summer, most areas switch to Mountain Daylight Time (MDT, UTC-06:00).
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 MST and NZDT
With a +20h offset there is no overlap inside a normal 9 AM – 5 PM day. NZDT opens at 9:00 AM NZDT, which is 5:00 AM in MST, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
MST and NZDT have no shared working hours because of the +20h gap. Teams need to alternate early starts or rely on asynchronous handovers.
MST is 20 hours ahead of NZDT (MST UTC-07:00 → NZDT UTC+13:00). 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
MST
☀ Currently in DST
Standard: UTC-07:00 · DST: UTC-06:00
Clocks fall back on Sun, Nov 1, 2026
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 MST and NZDT?
MST (MST, UTC-07:00) is 20 hours ahead of NZDT (NZDT, UTC+13:00). The gap is currently +20h.
How do I convert MST time to NZDT time?
Add +20h to MST local time. For example, 9:00 AM in MST is 5:00 AM in NZDT (next day).
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 +20h offset from MST.
What is the best time to call NZDT from MST?
There is no shared working-hours window because of the +20h gap. The closest option is 1:00 PM in MST, which is 9:00 AM in NZDT.
Which is ahead, MST or NZDT?
MST is 20 hours ahead of NZDT. When it is 12:00 PM in MST it is 8:00 AM in NZDT.
Does daylight saving time affect the MST–NZDT difference?
Neither zone observes daylight saving time, so the +20h offset between MST and NZDT is fixed all year.
Which other cities share MST's time zone?
MST also covers Denver, Phoenix, Salt Lake City, Calgary, Edmonton, Albuquerque, El Paso, Tucson and 2 more.
Which countries use MST, MST's zone?
MST is used in United States (Mountain), Canada (Alberta), Mexico (Chihuahua, Sonora).
Is there a day difference between MST and NZDT?
Sometimes. The +20h gap is large enough that 8:00 PM or later in MST already falls on the next day in NZDT.
What is the time difference between MST and NZDT?
NZDT is +20h from MST.
What timezone is MST in?
MST operates on its local timezone.
What timezone is NZDT in?
NZDT operates on its local timezone.
Which countries use MST (Mountain Standard Time)?
MST is used in United States (Mountain), Canada (Alberta), Mexico (Chihuahua, Sonora).
Does MST observe daylight saving time?
Yes, MST switches to MDT during summer months.
What are some interesting facts about MST?
Arizona does not observe daylight saving time, staying on MST year-round. The Navajo Nation in Arizona does observe DST, unlike the rest of the state.
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 MST, what time is it in NZDT?
When it is 12:00 AM (midnight) in MST (MST), it is +20h later in NZDT (NZDT).
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See every conversion from MST →·See every conversion from NZDT →