Does it account for Daylight Saving Time?

Yes, our converter uses the IANA timezone database, which includes all current DST rules for every timezone in the world.

UTC (Coordinated Universal Time) is the primary time standard by which the world regulates clocks. All timezones are defined as offsets from UTC.

Can I compare multiple timezones at once?

Yes, you can add multiple cities or timezones and see the equivalent times side by side.

How many timezones are there in the world?

There are 38 distinct UTC offsets in use, ranging from UTC-12 to UTC+14. This includes half-hour (UTC+5:30 India, UTC+9:30 Australia) and 45-minute offsets (UTC+5:45 Nepal, UTC+8:45 Australia).

What is the International Date Line?

The International Date Line (IDL) runs roughly along the 180° meridian in the Pacific Ocean. When you cross it westward, you gain a day; crossing eastward, you lose a day.

Why do some timezones have 30 or 45 minute offsets?

Countries chose offsets that best matched their solar noon. India uses UTC+5:30 and Nepal uses UTC+5:45 because standard hourly offsets didn't align well with their geography.

Which country has the most timezones?

France has the most (12 timezones) due to overseas territories. Russia spans 11 timezones. The US has 6 (including Hawaii and Alaska).

Tehran to New Zealand

+9h 30m

Tehran

IRSTSOURCE

Iran · UTC+03:30

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

New Zealand

NZDT

UTC+13:00☀ DST active

HH09

MM30

21:30 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

Tehran

New Zealand

12:00 AM

9:30 AM

2:00 AM

11:30 AM

4:00 AM

1:30 PM

6:00 AM

3:30 PM

8:00 AM

5:30 PM

10:00 AM

7:30 PM

12:00 PM

9:30 PM

2:00 PM

11:30 PM

4:00 PM

1:30 AM+1

6:00 PM

3:30 AM+1

8:00 PM

5:30 AM+1

10:00 PM

7:30 AM+1

Green rows indicate typical business hours (9 AM - 5 PM)

IRST and NZDT on the World Map

The map below highlights the IRST (Iran Standard Time) and NZDT (New Zealand Standard Time) timezone regions across the globe.

IRST Zone

→

NZDT Zone

Explore all world timezones interactively →

IRST – Iran Standard Time

UTC+03:30

Iran Standard Time (IRST) is the time zone for Iran, 3 hours and 30 minutes ahead of UTC.

Countries in IRST

Iran

Major Cities in IRST

TehranIsfahanMashhadTabrizShirazKaraj

Key Facts about IRST

•IRST is one of only a few time zones with a 30-minute offset.
•Iran observes daylight saving time, switching to IRDT (UTC+04:30).
•Tehran has a metropolitan population of over 16 million.

Daylight Saving:Yes – switches to IRDT

Learn more about IRST on Wikipedia

NZST – New Zealand Standard Time

UTC+12:00

New Zealand Standard Time (NZST) is the time zone for New Zealand, 12 hours ahead of UTC.

Countries in NZST

New Zealand

Major Cities in NZST

AucklandWellingtonChristchurchHamiltonDunedin

Key Facts about NZST

•New Zealand is among the first major countries to see a new day.
•NZST is 17 hours ahead of EST.
•New Zealand observes DST from September to April (Southern Hemisphere summer).

Daylight Saving:Yes – switches to NZDT

Learn more about NZST on Wikipedia

About Tehran

Wikipedia

Tehran operates on Iran Standard Time (IRST), UTC+3:30. Iran's unique half-hour offset makes Tehran time distinctive for regional business coordination.

Population:9.4 million

Metro:16.8 million

Business Hours:8:00 AM - 4:00 PM IRST

Currency:IRR (﷼)

Stock Exchange:TSE (Tehran Stock Exchange)

Key Landmarks

Azadi TowerGolestan PalaceGrand BazaarMilad TowerTabiat Bridge

Did You Know?

Iran Standard Time (IRST) is one of few timezones with a 30-minute offset (UTC+3:30).

Learn more about IRST timezone →

Tehran vs New Zealand: Offsets, DST and Best Call Times

Tehran runs on Iran Standard Time (IRST) at UTC+03:30. New Zealand runs on New Zealand Daylight Time (NZDT) at UTC+13:00, also currently on daylight saving time. That puts Tehran 9 hours 30 minutes ahead of New Zealand — a difference of +9h 30m at the current offsets.

In practice, when it is 9:00 AM in Tehran it is 6:30 PM in New Zealand. Midnight in Tehran is 9:30 AM in New Zealand.New Zealand observes daylight saving time while Tehran does not, so the gap narrows or widens by an hour part of the year.

Tehran to New Zealand time conversion table

Tehran (IRST)	New Zealand (NZDT)	Day
12:00 AM	9:30 AM	same day
6:00 AM	3:30 PM	same day
7:00 AM	4:30 PM	same day
8:00 AM	5:30 PM	same day
9:00 AM	6:30 PM	same day
12:00 PM	9:30 PM	same day
3:00 PM	12:30 AM	next day
5:00 PM	2:30 AM	next day
6:00 PM	3:30 AM	next day
9:00 PM	6:30 AM	next day

Why people convert Tehran to New Zealand time

Scheduling a call from Tehran to New Zealand: a 10:00 AM start in Tehran lands at 7:30 PM in New Zealand, so you can confirm the slot without doing the arithmetic yourself.
Handling a +9h 30m gap: Tehran and New Zealand 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 New Zealand is 6:30 PM in Tehran.
Booking travel or deliveries: tracking New Zealand local time against Tehran keeps pickup windows and arrival estimates honest across the +9h 30m offset.

Always state the zone abbreviation, not just the hour. "3:00 PM IRST" is unambiguous; "3 PM" across a +9h 30m gap is not.
With a +9h 30m gap there is no shared 9-to-5 window, so alternate the early start: one week Tehran takes the early slot, the next week New Zealand does.
New Zealand: Clocks fall back on Sat, Apr 3, 2027. Any meeting series spanning that date will shift by an hour in local time.

About IRST (Iran Standard Time)

Iran Standard Time (IRST) is one of the few time zones with a 30-minute offset. Iran observes daylight saving time (IRDT, UTC+04:30) from late March to late September. Tehran, the capital, is one of the largest cities in the Middle East.

About NZST (New Zealand Standard Time)

New Zealand Standard Time (NZST) is the standard time zone for New Zealand and its dependencies. New Zealand is among the first countries to see a new calendar day. During summer (September to April), clocks advance to New Zealand Daylight Time (NZDT, UTC+13:00).

Best time to call between Tehran and New Zealand

With a +9h 30m offset there is no overlap inside a normal 9 AM – 5 PM day. New Zealand opens at 9:00 AM NZDT, which is 6:30 PM in Tehran, so real-time calls need an early-morning or late-evening slot on one side.

Business hours overlap

Tehran and New Zealand have no shared working hours because of the +9h 30m gap. Teams need to alternate early starts or rely on asynchronous handovers.

Tehran is 9 hours 30 minutes ahead of New Zealand (IRST UTC+03:30 → 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

Tehran

Does not observe DST

New Zealand

☀ 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:

⏳

History of Timekeeping

From sundials to atomic clocks - 5000 years of measuring time

🌍

How Time Zones Work

UTC, offsets, and why zones don't follow straight lines

☀️

Daylight Saving Time

DST dates, which countries observe it, and the ongoing debate

Frequently Asked Questions

What is the time difference between Tehran and New Zealand?

Tehran (IRST, UTC+03:30) is 9 hours 30 minutes ahead of New Zealand (NZDT, UTC+13:00). The gap is currently +9h 30m.

How do I convert Tehran time to New Zealand time?

Add +9h 30m to Tehran local time. For example, 9:00 AM in Tehran is 6:30 PM in New Zealand.

What time is it in New Zealand right now?

New Zealand 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 +9h 30m offset from Tehran.

What is the best time to call New Zealand from Tehran?

There is no shared working-hours window because of the +9h 30m gap. The closest option is 1:00 PM in Tehran, which is 10:30 PM in New Zealand.

Which is ahead, Tehran or New Zealand?

Tehran is 9 hours 30 minutes ahead of New Zealand. When it is 12:00 PM in Tehran it is 9:30 PM in New Zealand.

Do Tehran and New Zealand use different time zones?

Tehran (Iran) uses IRST at UTC+03:30, while New Zealand (New Zealand) uses NZDT at UTC+13:00. The IANA identifiers are Asia/Tehran and Pacific/Auckland.

Does daylight saving time affect the Tehran–New Zealand difference?

Yes at the moment: New Zealand is on daylight saving time and Tehran is not, so the +9h 30m gap shifts by an hour when exactly one of them changes clocks.

Which other cities share Tehran's time zone?

IRST also covers Tehran, Isfahan, Mashhad, Tabriz, Shiraz, Karaj.

Which countries use IRST, Tehran's zone?

IRST is used in Iran.

Is there a day difference between Tehran and New Zealand?

Not normally. The +9h 30m gap only pushes the date over for late-evening times.

What is the time difference between Tehran and New Zealand?

New Zealand is +9h 30m from Tehran.

What timezone is Tehran in?

Tehran operates on Iran Standard Time (IRST), UTC+3:30. Iran's unique half-hour offset makes Tehran time distinctive for regional business coordination.