NZDT to MST Time Converter
MST is 19 hours behind NZDT. NZDT is UTC+13:00, and The US Mountain states are currently on MDT (UTC-6:00).
Best Time to Call Between NZDT and MST
Both zones are inside normal business hours between 9:00 AM and 12:00 PM NZDT — that's 2:00 PM to 5:00 PM MST. That's a 3-hour window.
both at work NZDT only MST only neither — hours along the strip are NZDT.
Common Times Converted
NZDT on the left, MST on the right.
NZDT to MST: Full 24-Hour Conversion Table
Shaded rows are working hours; the darker shade marks the hours when both zones are at work.
| NZDT | MST | Working hours |
|---|---|---|
| 12:00 AM | 5:00 AM prev day | — |
| 1:00 AM | 6:00 AM prev day | — |
| 2:00 AM | 7:00 AM prev day | — |
| 3:00 AM | 8:00 AM prev day | — |
| 4:00 AM | 9:00 AM prev day | MST only |
| 5:00 AM | 10:00 AM prev day | MST only |
| 6:00 AM | 11:00 AM prev day | MST only |
| 7:00 AM | 12:00 PM prev day | MST only |
| 8:00 AM | 1:00 PM prev day | MST only |
| 9:00 AM | 2:00 PM prev day | Both zones |
| 10:00 AM | 3:00 PM prev day | Both zones |
| 11:00 AM | 4:00 PM prev day | Both zones |
| 12:00 PM | 5:00 PM prev day | NZDT only |
| 1:00 PM | 6:00 PM prev day | NZDT only |
| 2:00 PM | 7:00 PM prev day | NZDT only |
| 3:00 PM | 8:00 PM prev day | NZDT only |
| 4:00 PM | 9:00 PM prev day | NZDT only |
| 5:00 PM | 10:00 PM prev day | — |
| 6:00 PM | 11:00 PM prev day | — |
| 7:00 PM | 12:00 AM | — |
| 8:00 PM | 1:00 AM | — |
| 9:00 PM | 2:00 AM | — |
| 10:00 PM | 3:00 AM | — |
| 11:00 PM | 4:00 AM | — |
What NZDT and MST Actually Are
NZDT — New Zealand Daylight Time
Auckland, Wellington, Christchurch in the southern summer. Standing at UTC+13:00 as written, and the region does change its clocks, so its live offset moves by an hour twice a year. The next change is on Sunday, April 4, 2027, to NZST.
New Zealand daylight time runs late September to early April, and the Chatham Islands keep their own clock 45 minutes ahead of the mainland throughout.
MST — Mountain Standard Time
Denver, Salt Lake City, Calgary — and Phoenix year-round. Standing at UTC-7:00 as written, and the region does change its clocks, so its live offset moves by an hour twice a year. The next change is on Sunday, November 1, 2026, to MST. Arizona stays on MST all year, so Phoenix and Denver are an hour apart for eight months and identical for four.
Arizona has stayed on MST year-round since 1968 — the Navajo Nation within it does observe daylight saving, making the state a patchwork.
What This Means in Practice
The date changes mid-working-day
For 8 of the eight hours in a normal NZDT working day, the equivalent MST time falls on a different calendar date. Anything scheduled in that stretch needs the date checked as well as the time, or a Tuesday call quietly becomes a Wednesday one at the other end.
Both sides change clocks, on different dates
Both regions observe daylight saving but do not switch on the same day, so for a week or two each spring and fall the gap between them is an hour different from the rest of the year. Those short windows are where recurring invitations quietly break.
Nearly opposite sides of the clock
At 19 hours apart, one side's morning is the other side's night. Handing work over at the end of a shift usually beats trying to get both parties in the same call.
Major Cities in Each Zone
Cities on NZDT
Cities on MST
Frequently Asked Questions
What is the time difference between NZDT and MST?
MST is 19 hours behind NZDT. That is the live figure. Taken strictly as written, the gap between NZDT and MST is 20 hours — the two differ because at least one of these regions is currently on daylight saving.
What is 9:00 AM NZDT in MST?
9:00 AM NZDT is 2:00 PM the previous day MST.
What are the best hours to schedule a call between NZDT and MST?
Between 9:00 AM and 12:00 PM NZDT, which is 2:00 PM to 5:00 PM MST. Both sides are inside normal business hours through that window.
Does the difference between NZDT and MST change during the year?
Yes. Both regions observe daylight saving, and they do not switch on the same dates, so the gap shifts by an hour at least twice a year. The next clock change is on Sunday, April 4, 2027.
Does MST always mean Mountain Standard Time?
Arizona stays on MST all year, so Phoenix and Denver are an hour apart for eight months and identical for four.