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.

Tehran to PST

-11h 30m

Tehran

IRSTSOURCE

Iran · UTC+03:30

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

PST

UTC-07:00☀ DST active

HH12

MM30

00:30 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

Tehran

PST

12:00 AM

1:30 PM-1

2:00 AM

3:30 PM-1

4:00 AM

5:30 PM-1

6:00 AM

7:30 PM-1

8:00 AM

9:30 PM-1

10:00 AM

11:30 PM-1

12:00 PM

1:30 AM

2:00 PM

3:30 AM

4:00 PM

5:30 AM

6:00 PM

7:30 AM

8:00 PM

9:30 AM

10:00 PM

11:30 AM

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

IRST and PST on the World Map

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

IRST Zone

→

PST 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

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

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 to PST Time Difference – Complete Guide

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

In practice, when it is 9:00 AM in Tehran it is 9:30 PM in PST on the previous day. Midnight in Tehran is 12:30 PM in PST. Neither zone observes daylight saving time, so the offset between them stays constant all year.

Tehran to PST time conversion table

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

Why people convert Tehran to PST time

Scheduling a call from Tehran to PST: a 10:00 AM start in Tehran lands at 10:30 PM in PST the previous day, so you can confirm the slot without doing the arithmetic yourself.
Handling a -11h 30m gap: Tehran and PST 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 PST is 9:30 PM in Tehran.
Coordinating a Tehran-based team with PST 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 IRST" 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 Tehran takes the early slot, the next week PST does.

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 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.

Best time to call between Tehran and PST

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

Business hours overlap

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

Tehran is 11 hours 30 minutes behind PST (IRST UTC+03:30 → PST UTC-08:00). 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

PST

☀ Currently in DST

Standard: UTC-08:00 · DST: UTC-07:00

Clocks fall back on Sun, Nov 1, 2026

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 PST?

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

How do I convert Tehran time to PST time?

Add -11h 30m to Tehran local time. For example, 9:00 AM in Tehran is 9:30 PM in PST (previous day).

What time is it in PST right now?

PST uses PST at UTC-08:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -11h 30m offset from Tehran.

What is the best time to call PST from Tehran?

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

Which is behind, Tehran or PST?

Tehran is 11 hours 30 minutes behind PST. When it is 12:00 PM in Tehran it is 12:30 AM in PST.

Do Tehran and PST use different time zones?

Tehran (Iran) uses IRST at UTC+03:30, while PST uses PST at UTC-08:00. The IANA identifiers are Asia/Tehran and America/Los_Angeles.

Does daylight saving time affect the Tehran–PST difference?

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

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 PST?

Not normally. The -11h 30m gap only pushes the date over the previous day.

What is the time difference between Tehran and PST?

PST is -11h 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.