NST to Iran
+7hNST
NSTSOURCEIran
IRSTGreen rows indicate typical business hours (9 AM - 5 PM)
NST and IRST on the World Map
The map below highlights the NST (Newfoundland Standard Time) and IRST (Iran Standard Time) timezone regions across the globe.
NST – Newfoundland Standard Time
UTC-03:30Newfoundland Standard Time (NST) is a unique half-hour offset time zone in Canada, 3.5 hours behind UTC.
- •NST is one of only a few half-hour offset time zones in the world.
- •Newfoundland joined Canada in 1949 and kept its unique time zone.
- •St. John's is the easternmost city in North America.
IRST – Iran Standard Time
UTC+03:30Iran Standard Time (IRST) is the time zone for Iran, 3 hours and 30 minutes ahead of UTC.
- •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.
NST to Iran Time Difference – Complete Guide
NST runs on Newfoundland Standard Time (NST) at UTC-03:30. Iran runs on Iran Standard Time (IRST) at UTC+03:30. That puts NST 7 hours ahead of Iran — a difference of +7h at the current offsets.
In practice, when it is 9:00 AM in NST it is 4:00 PM in Iran. Midnight in NST is 7:00 AM in Iran. Neither zone observes daylight saving time, so the offset between them stays constant all year.
NST to Iran time conversion table
| NST (NST) | Iran (IRST) | Day |
|---|---|---|
| 12:00 AM | 7:00 AM | same day |
| 6:00 AM | 1:00 PM | same day |
| 7:00 AM | 2:00 PM | same day |
| 8:00 AM | 3:00 PM | same day |
| 9:00 AM | 4:00 PM | same day |
| 12:00 PM | 7:00 PM | same day |
| 3:00 PM | 10:00 PM | same day |
| 5:00 PM | 12:00 AM | next day |
| 6:00 PM | 1:00 AM | next day |
| 9:00 PM | 4:00 AM | next day |
Why people convert NST to Iran time
- Scheduling a call from NST to Iran: a 10:00 AM start in NST lands at 5:00 PM in Iran, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both NST and Iran are inside the 9-to-5 working day between 9:00 AM and 10:00 AM NST time (4:00 PM–5:00 PM IRST). That is roughly 1 hours of usable overlap.
- Coordinating a NST-based team with Iran 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 NST" is unambiguous; "3 PM" across a +7h gap is not.
- Block 9:00 AM–10:00 AM NST as the recurring meeting window if you work primarily from NST and need Iran colleagues present.
About NST (Newfoundland Standard Time)
Newfoundland Standard Time (NST) is one of the few half-hour offset time zones in the world. It covers the island of Newfoundland in Canada and is 30 minutes ahead of Atlantic Standard Time. This unique offset exists because Newfoundland was an independent country until 1949.
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.
Best time to call between NST and Iran
Both NST and Iran sit inside the 9 AM – 5 PM working day between 9:00 AM–10:00 AM NST, which is 4:00 PM–5:00 PM IRST. That gives roughly 1 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
NST and Iran overlap for only 60 minutes (9:00 AM–10:00 AM NST), so meetings have to be booked precisely.
NST is 7 hours ahead of Iran (NST UTC-03:30 → IRST UTC+03:30). The shared working window is 9:00 AM–10:00 AM NST. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
NST
☀ Currently in DST
Standard: UTC-03:30 · DST: UTC-02:30
Clocks fall back on Sun, Nov 1, 2026
Iran
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 NST and Iran?
NST (NST, UTC-03:30) is 7 hours ahead of Iran (IRST, UTC+03:30). The gap is currently +7h.
How do I convert NST time to Iran time?
Add +7h to NST local time. For example, 9:00 AM in NST is 4:00 PM in Iran.
What time is it in Iran right now?
Iran uses IRST at UTC+03:30. Use the live converter at the top of this page — it updates in real time and already accounts for the +7h offset from NST.
What is the best time to call Iran from NST?
Call between 9:00 AM and 10:00 AM NST — that maps to 4:00 PM–5:00 PM IRST and keeps both parties inside the working day.
Which is ahead, NST or Iran?
NST is 7 hours ahead of Iran. When it is 12:00 PM in NST it is 7:00 PM in Iran.
Do NST and Iran use different time zones?
NST uses NST at UTC-03:30, while Iran (Iran) uses IRST at UTC+03:30. The IANA identifiers are America/St_Johns and Asia/Tehran.
Does daylight saving time affect the NST–Iran difference?
Neither zone observes daylight saving time, so the +7h offset between NST and Iran is fixed all year.
Which other cities share NST's time zone?
NST also covers St. John's, Corner Brook, Mount Pearl.
Which countries use NST, NST's zone?
NST is used in Canada (Newfoundland).
Is there a day difference between NST and Iran?
Not normally. The +7h gap only pushes the date over for late-evening times.
What is the time difference between NST and Iran?
Iran is +7h from NST.
What timezone is NST in?
NST operates on its local timezone.
What timezone is Iran in?
Iran operates on its local timezone.
Which countries use NST (Newfoundland Standard Time)?
NST is used in Canada (Newfoundland).
Does NST observe daylight saving time?
Yes, NST switches to NDT during summer months.
What are some interesting facts about NST?
NST is one of only a few half-hour offset time zones in the world. Newfoundland joined Canada in 1949 and kept its unique time zone.
Which cities are in the IRST timezone?
Major cities in the IRST timezone include Tehran, Isfahan, Mashhad, Tabriz, Shiraz, Karaj.
What is the UTC offset for IRST?
Iran Standard Time (IRST) is at UTC+03:30. During daylight saving time, it shifts to IRDT.
What should I know about the IRST timezone?
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).
When is it midnight in NST, what time is it in Iran?
When it is 12:00 AM (midnight) in NST (NST), it is +7h later in Iran (IRST).
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