Does it handle Daylight Saving Time?

Yes, the tool automatically adjusts for Daylight Saving Time based on the specific date you select, ensuring accurate conversions year-round.

Can I add multiple cities?

Yes, you can add as many cities as you need to the dashboard to compare times across your entire global network simultaneously.

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

Quick Reference

Time Conversion Table

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.

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 AM	10:30 AM	same day
6:00 AM	4:30 PM	same day
7:00 AM	5:30 PM	same day
8:00 AM	6:30 PM	same day
9:00 AM	7:30 PM	same day
12:00 PM	10:30 PM	same day
3:00 PM	1:30 AM	next day
5:00 PM	3:30 AM	next day
6:00 PM	4:30 AM	next day
9:00 PM	7:30 AM	next 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

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 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.