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PDT to Tehran

+10h 30m

PDT

PDTSOURCE
UTC-07:00☀ DST active
HH12
:
MM00
  
12:00 (24-hr)
12 AM6 AM12 PM6 PM12 AM

Tehran

IRST
Iran · UTC+03:30
HH10
:
MM30
  
22:30 (24-hr)
12 AM6 AM12 PM6 PM12 AM
PDT
Tehran
12:00 AM
10:30 AM
2:00 AM
12:30 PM
4:00 AM
2:30 PM
6:00 AM
4:30 PM
8:00 AM
6:30 PM
10:00 AM
8:30 PM
12:00 PM
10:30 PM
2:00 PM
12:30 AM+1
4:00 PM
2:30 AM+1
6:00 PM
4:30 AM+1
8:00 PM
6:30 AM+1
10:00 PM
8:30 AM+1

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

PDT and IRST on the World Map

The map below highlights the PDT (Pacific Daylight Time) and IRST (Iran Standard Time) timezone regions across the globe.

PDTIRSTLos AngelesSan FranciscoSeattleVancouverTehranIsfahanMashhadTabriz
PDT Zone
→
IRST Zone

Explore all world timezones interactively →

PDT – Pacific Daylight Time

UTC-07:00

Pacific Daylight Time (PDT) is the daylight saving offset on the US/Canada Pacific coast, 7 hours behind UTC.

Countries in PDT
United States (Pacific)Canada (British Columbia)Mexico (Baja California)
Major Cities in PDT
Los AngelesSan FranciscoSeattleVancouverPortland
Key Facts about PDT
  • •PDT aligns with MST at UTC-07:00.
  • •Tech company earnings calls often reference PDT/PST times.
Daylight Saving:Yes – switches to PST
Learn more about PDT on Wikipedia

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

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 →

PDT vs Tehran: Offsets, DST and Best Call Times

PDT runs on Pacific Daylight Time (PDT) at UTC-07:00. Tehran runs on Iran Standard Time (IRST) at UTC+03:30. That puts PDT 10 hours 30 minutes ahead of Tehran — a difference of +10h 30m at the current offsets.

In practice, when it is 9:00 AM in PDT it is 7:30 PM in Tehran. Midnight in PDT is 10:30 AM in Tehran. Neither zone observes daylight saving time, so the offset between them stays constant all year.

PDT to Tehran time conversion table

PDT (PDT)Tehran (IRST)Day
12:00 AM10:30 AMsame day
6:00 AM4:30 PMsame day
7:00 AM5:30 PMsame day
8:00 AM6:30 PMsame day
9:00 AM7:30 PMsame day
12:00 PM10:30 PMsame day
3:00 PM1:30 AMnext day
5:00 PM3:30 AMnext day
6:00 PM4:30 AMnext day
9:00 PM7:30 AMnext day

Why people convert PDT to Tehran time

  • Scheduling a call from PDT to Tehran: a 10:00 AM start in PDT lands at 8:30 PM in Tehran, so you can confirm the slot without doing the arithmetic yourself.
  • Handling a +10h 30m gap: PDT and Tehran 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 Tehran is 7:30 PM in PDT.
  • Watching a live event or market open: PDT viewers need 7:30 PM in Tehran to catch a 9:00 AM start there, and 1:30 PM if the event is anchored to PDT.
  • Always state the zone abbreviation, not just the hour. "3:00 PM PDT" is unambiguous; "3 PM" across a +10h 30m gap is not.
  • With a +10h 30m gap there is no shared 9-to-5 window, so alternate the early start: one week PDT takes the early slot, the next week Tehran does.

About PDT (Pacific Daylight Time)

Pacific Daylight Time (PDT) is observed from March to November on the Pacific coast. During PDT, the west coast is 7 hours behind UTC and only 2 hours behind the east coast's EDT.

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 PDT and Tehran

With a +10h 30m offset there is no overlap inside a normal 9 AM – 5 PM day. Tehran opens at 9:00 AM IRST, which is 7:30 PM in PDT, so real-time calls need an early-morning or late-evening slot on one side.

Business hours overlap

PDT and Tehran have no shared working hours because of the +10h 30m gap. Teams need to alternate early starts or rely on asynchronous handovers.

PDT is 10 hours 30 minutes ahead of Tehran (PDT UTC-07:00 → IRST UTC+03:30). 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

PDT

☀ Currently in DST

Standard: UTC-08:00 · DST: UTC-07:00

Clocks fall back on Sun, Nov 1, 2026

Tehran

Does not observe DST

Frequently Asked Questions

What is the time difference between PDT and Tehran?

PDT (PDT, UTC-07:00) is 10 hours 30 minutes ahead of Tehran (IRST, UTC+03:30). The gap is currently +10h 30m.

How do I convert PDT time to Tehran time?

Add +10h 30m to PDT local time. For example, 9:00 AM in PDT is 7:30 PM in Tehran.

What time is it in Tehran right now?

Tehran 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 +10h 30m offset from PDT.

What is the best time to call Tehran from PDT?

There is no shared working-hours window because of the +10h 30m gap. The closest option is 1:00 PM in PDT, which is 11:30 PM in Tehran.

Which is ahead, PDT or Tehran?

PDT is 10 hours 30 minutes ahead of Tehran. When it is 12:00 PM in PDT it is 10:30 PM in Tehran.

Do PDT and Tehran use different time zones?

PDT uses PDT at UTC-07:00, while Tehran (Iran) uses IRST at UTC+03:30. The IANA identifiers are America/Los_Angeles and Asia/Tehran.

Does daylight saving time affect the PDT–Tehran difference?

Neither zone observes daylight saving time, so the +10h 30m offset between PDT and Tehran is fixed all year.

Which other cities share PDT's time zone?

PDT also covers Los Angeles, San Francisco, Seattle, Vancouver, Portland.

Which countries use PDT, PDT's zone?

PDT is used in United States (Pacific), Canada (British Columbia), Mexico (Baja California).

Is there a day difference between PDT and Tehran?

Not normally. The +10h 30m gap only pushes the date over for late-evening times.

What is the time difference between PDT and Tehran?

Tehran is +10h 30m from PDT.

What timezone is PDT in?

PDT operates on its local timezone.

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.

What are the business hours in Tehran?

Standard business hours in Tehran are 8:00 AM - 4:00 PM IRST.

Which countries use PDT (Pacific Daylight Time)?

PDT is used in United States (Pacific), Canada (British Columbia), Mexico (Baja California).

Does PDT observe daylight saving time?

Yes, PDT switches to PST during summer months.

What are some interesting facts about PDT?

PDT aligns with MST at UTC-07:00. Tech company earnings calls often reference PDT/PST times.

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 PDT, what time is it in Tehran?

When it is 12:00 AM (midnight) in PDT (PDT), it is +10h 30m later in Tehran (IRST).