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.

PST to Tehran

+11h 30m

PST

PSTSOURCE

UTC-07:00☀ DST active

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Tehran

IRST

Iran · UTC+03:30

HH11

MM30

23:30 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

PST

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)

PST and IRST on the World Map

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

PST Zone

→

IRST Zone

Explore all world timezones interactively →

PST – Pacific Standard Time

UTC-08:00

Pacific Standard Time (PST) is the time zone for the US and Canadian Pacific coast, 8 hours behind UTC.

Countries in PST

United States (Pacific)Canada (British Columbia)Mexico (Baja California)

Major Cities in PST

Los AngelesSan FranciscoSeattleVancouverSan DiegoPortlandLas VegasSacramentoSan JoseTijuana

Key Facts about PST

•Silicon Valley and the world's biggest tech companies operate on Pacific Time.
•The Hollywood film industry runs on PST/PDT.
•PST is 3 hours behind EST, creating a significant business hours gap.
•Vancouver, Canada's third-largest city, uses PST.

Daylight Saving:Yes – switches to PDT

Learn more about PST 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 →

PST to Tehran Time Difference – Complete Guide

PST runs on Pacific Standard Time (PST) at UTC-08:00. Tehran runs on Iran Standard Time (IRST) at UTC+03:30. That puts PST 11 hours 30 minutes ahead of Tehran — a difference of +11h 30m at the current offsets.

In practice, when it is 9:00 AM in PST it is 8:30 PM in Tehran. Midnight in PST is 11:30 AM in Tehran. Neither zone observes daylight saving time, so the offset between them stays constant all year.

PST to Tehran time conversion table

PST (PST)	Tehran (IRST)	Day
12:00 AM	11:30 AM	same day
6:00 AM	5:30 PM	same day
7:00 AM	6:30 PM	same day
8:00 AM	7:30 PM	same day
9:00 AM	8:30 PM	same day
12:00 PM	11:30 PM	same day
3:00 PM	2:30 AM	next day
5:00 PM	4:30 AM	next day
6:00 PM	5:30 AM	next day
9:00 PM	8:30 AM	next day

Why people convert PST to Tehran time

Scheduling a call from PST to Tehran: a 10:00 AM start in PST lands at 9:30 PM in Tehran, so you can confirm the slot without doing the arithmetic yourself.
Handling a +11h 30m gap: PST 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 8:30 PM in PST.
Booking travel or deliveries: tracking Tehran local time against PST keeps pickup windows and arrival estimates honest across the +11h 30m offset.

Always state the zone abbreviation, not just the hour. "3:00 PM PST" is unambiguous; "3 PM" across a +11h 30m gap is not.
With a +11h 30m gap there is no shared 9-to-5 window, so alternate the early start: one week PST takes the early slot, the next week Tehran does.

About PST (Pacific Standard Time)

Pacific Standard Time (PST) covers the west coast of North America, including tech hubs like San Francisco and Seattle, and entertainment capital Los Angeles. The Pacific Time Zone is home to Silicon Valley and the world's largest technology companies. During summer, clocks advance to Pacific Daylight Time (PDT, UTC-07:00). PST is also observed in Baja California, Mexico.

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 PST and Tehran

With a +11h 30m offset there is no overlap inside a normal 9 AM – 5 PM day. Tehran opens at 9:00 AM IRST, which is 8:30 PM in PST, so real-time calls need an early-morning or late-evening slot on one side.

Business hours overlap

PST and Tehran have no shared working hours because of the +11h 30m gap. Teams need to alternate early starts or rely on asynchronous handovers.

PST is 11 hours 30 minutes ahead of Tehran (PST UTC-08:00 → 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

PST

☀ 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 PST and Tehran?

PST (PST, UTC-08:00) is 11 hours 30 minutes ahead of Tehran (IRST, UTC+03:30). The gap is currently +11h 30m.

How do I convert PST time to Tehran time?

Add +11h 30m to PST local time. For example, 9:00 AM in PST is 8:30 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 +11h 30m offset from PST.

What is the best time to call Tehran from PST?

There is no shared working-hours window because of the +11h 30m gap. The closest option is 1:00 PM in PST, which is 12:30 AM in Tehran.

Which is ahead, PST or Tehran?

PST is 11 hours 30 minutes ahead of Tehran. When it is 12:00 PM in PST it is 11:30 PM in Tehran.

Do PST and Tehran use different time zones?

PST uses PST at UTC-08:00, 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 PST–Tehran difference?

Neither zone observes daylight saving time, so the +11h 30m offset between PST and Tehran is fixed all year.

Which other cities share PST's time zone?

PST also covers Los Angeles, San Francisco, Seattle, Vancouver, San Diego, Portland, Las Vegas, Sacramento and 2 more.

Which countries use PST, PST's zone?

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

Is there a day difference between PST and Tehran?

Not normally. The +11h 30m gap only pushes the date over for late-evening times.

What is the time difference between PST and Tehran?

Tehran is +11h 30m from PST.

What timezone is PST in?

PST 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.