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.

PET to Tehran

+8h 30m

PET

PETSOURCE

UTC-05:00

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Tehran

IRST

Iran · UTC+03:30

HH08

MM30

20:30 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

PET

Tehran

12:00 AM

8:30 AM

2:00 AM

10:30 AM

4:00 AM

12:30 PM

6:00 AM

2:30 PM

8:00 AM

4:30 PM

10:00 AM

6:30 PM

12:00 PM

8:30 PM

2:00 PM

10:30 PM

4:00 PM

12:30 AM+1

6:00 PM

2:30 AM+1

8:00 PM

4:30 AM+1

10:00 PM

6:30 AM+1

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

PET and IRST on the World Map

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

PET Zone

→

IRST Zone

Explore all world timezones interactively →

PET – Peru Time

UTC-05:00

Peru Time (PET) is the standard time for Peru, 5 hours behind UTC.

Countries in PET

Peru

Major Cities in PET

LimaArequipaTrujilloCuscoCallao

Key Facts about PET

•Peru does not observe daylight saving time.
•PET is the same offset as EST (UTC-05:00).
•Lima is the 5th largest city in the Americas.

Daylight Saving:No – UTC-05:00 year-round

Learn more about PET 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 →

Comparing Time Zones: PET and Tehran

PET runs on Peru Time (PET) at UTC-05:00. Tehran runs on Iran Standard Time (IRST) at UTC+03:30. That puts PET 8 hours 30 minutes ahead of Tehran — a difference of +8h 30m at the current offsets.

In practice, when it is 9:00 AM in PET it is 5:30 PM in Tehran. Midnight in PET is 8:30 AM in Tehran. Neither zone observes daylight saving time, so the offset between them stays constant all year.

PET to Tehran time conversion table

PET (PET)	Tehran (IRST)	Day
12:00 AM	8:30 AM	same day
6:00 AM	2:30 PM	same day
7:00 AM	3:30 PM	same day
8:00 AM	4:30 PM	same day
9:00 AM	5:30 PM	same day
12:00 PM	8:30 PM	same day
3:00 PM	11:30 PM	same day
5:00 PM	1:30 AM	next day
6:00 PM	2:30 AM	next day
9:00 PM	5:30 AM	next day

Why people convert PET to Tehran time

Scheduling a call from PET to Tehran: a 10:00 AM start in PET lands at 6:30 PM in Tehran, so you can confirm the slot without doing the arithmetic yourself.
Handling a +8h 30m gap: PET 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 5:30 PM in PET.
Watching a live event or market open: PET viewers need 5:30 PM in Tehran to catch a 9:00 AM start there, and 3:30 PM if the event is anchored to PET.

Always state the zone abbreviation, not just the hour. "3:00 PM PET" is unambiguous; "3 PM" across a +8h 30m gap is not.
With a +8h 30m gap there is no shared 9-to-5 window, so alternate the early start: one week PET takes the early slot, the next week Tehran does.

About PET (Peru Time)

Peru Time (PET) is the time zone used throughout Peru. Peru does not observe daylight saving time. PET shares the same offset as EST (UTC-05:00). Lima, the capital, is the economic center of Peru.

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 PET and Tehran

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

Business hours overlap

PET and Tehran have no shared working hours because of the +8h 30m gap. Teams need to alternate early starts or rely on asynchronous handovers.

PET is 8 hours 30 minutes ahead of Tehran (PET UTC-05:00 → 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.

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 PET and Tehran?

PET (PET, UTC-05:00) is 8 hours 30 minutes ahead of Tehran (IRST, UTC+03:30). The gap is currently +8h 30m.

How do I convert PET time to Tehran time?

Add +8h 30m to PET local time. For example, 9:00 AM in PET is 5:30 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 +8h 30m offset from PET.

What is the best time to call Tehran from PET?

There is no shared working-hours window because of the +8h 30m gap. The closest option is 1:00 PM in PET, which is 9:30 PM in Tehran.

Which is ahead, PET or Tehran?

PET is 8 hours 30 minutes ahead of Tehran. When it is 12:00 PM in PET it is 8:30 PM in Tehran.

Do PET and Tehran use different time zones?

PET uses PET at UTC-05:00, while Tehran (Iran) uses IRST at UTC+03:30. The IANA identifiers are America/Lima and Asia/Tehran.

Does daylight saving time affect the PET–Tehran difference?

Neither zone observes daylight saving time, so the +8h 30m offset between PET and Tehran is fixed all year.

Which other cities share PET's time zone?

PET also covers Lima, Arequipa, Trujillo, Cusco, Callao.

Which countries use PET, PET's zone?

PET is used in Peru.

Is there a day difference between PET and Tehran?

Not normally. The +8h 30m gap only pushes the date over for late-evening times.

What is the time difference between PET and Tehran?

Tehran is +8h 30m from PET.

What timezone is PET in?

PET 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.