Does it account for Daylight Saving Time?

Yes, our converter uses the IANA timezone database, which includes all current DST rules for every timezone in the world.

UTC (Coordinated Universal Time) is the primary time standard by which the world regulates clocks. All timezones are defined as offsets from UTC.

Can I compare multiple timezones at once?

Yes, you can add multiple cities or timezones and see the equivalent times side by side.

How many timezones are there in the world?

There are 38 distinct UTC offsets in use, ranging from UTC-12 to UTC+14. This includes half-hour (UTC+5:30 India, UTC+9:30 Australia) and 45-minute offsets (UTC+5:45 Nepal, UTC+8:45 Australia).

What is the International Date Line?

The International Date Line (IDL) runs roughly along the 180° meridian in the Pacific Ocean. When you cross it westward, you gain a day; crossing eastward, you lose a day.

Why do some timezones have 30 or 45 minute offsets?

Countries chose offsets that best matched their solar noon. India uses UTC+5:30 and Nepal uses UTC+5:45 because standard hourly offsets didn't align well with their geography.

Which country has the most timezones?

France has the most (12 timezones) due to overseas territories. Russia spans 11 timezones. The US has 6 (including Hawaii and Alaska).

PET to GMT

+5h

PET

PETSOURCE

UTC-05:00

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

GMT

UTC+01:00☀ DST active

HH05

MM00

17:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

PET

GMT

12:00 AM

6:00 AM

2:00 AM

8:00 AM

4:00 AM

10:00 AM

6:00 AM

12:00 PM

8:00 AM

2:00 PM

10:00 AM

4:00 PM

12:00 PM

6:00 PM

2:00 PM

8:00 PM

4:00 PM

10:00 PM

6:00 PM

12:00 AM+1

8:00 PM

2:00 AM+1

10:00 PM

4:00 AM+1

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

PET and GMT on the World Map

The map below highlights the PET (Peru Time) and GMT (Greenwich Mean Time) timezone regions across the globe.

PET Zone

→

GMT 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

GMT – Greenwich Mean Time

UTC+00:00

Greenwich Mean Time (GMT) is the mean solar time at the Royal Observatory in Greenwich, London. It is the same as UTC+00:00.

Countries in GMT

United KingdomIrelandIcelandPortugal (mainland)GhanaSenegalMaliMauritaniaGambiaGuineaSierra LeoneLiberiaIvory CoastBurkina FasoMorocco (historically)

Major Cities in GMT

LondonDublinLisbonAccraReykjavikEdinburghCasablancaDakarBamakoAbidjanConakryFreetownMonrovia

Key Facts about GMT

•GMT is based on the Prime Meridian (0° longitude) passing through Greenwich, London.
•The Royal Observatory in Greenwich has been the reference point for GMT since 1884.
•GMT and UTC are often used interchangeably, but UTC is based on atomic clocks.
•Iceland uses GMT year-round and never observes daylight saving time.
•The UK switches from GMT to BST (British Summer Time) in late March each year.

Daylight Saving:Yes – switches to BST

Learn more about GMT on Wikipedia

Comparing Time Zones: PET and GMT

PET runs on Peru Time (PET) at UTC-05:00. GMT runs on Greenwich Mean Time (GMT) at UTC+00:00. That puts PET 5 hours ahead of GMT — a difference of +5h at the current offsets.

In practice, when it is 9:00 AM in PET it is 2:00 PM in GMT. Midnight in PET is 5:00 AM in GMT. Neither zone observes daylight saving time, so the offset between them stays constant all year.

PET to GMT time conversion table

PET (PET)	GMT (GMT)	Day
12:00 AM	5:00 AM	same day
6:00 AM	11:00 AM	same day
7:00 AM	12:00 PM	same day
8:00 AM	1:00 PM	same day
9:00 AM	2:00 PM	same day
12:00 PM	5:00 PM	same day
3:00 PM	8:00 PM	same day
5:00 PM	10:00 PM	same day
6:00 PM	11:00 PM	same day
9:00 PM	2:00 AM	next day

Why people convert PET to GMT time

Scheduling a call from PET to GMT: a 10:00 AM start in PET lands at 3:00 PM in GMT, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both PET and GMT are inside the 9-to-5 working day between 9:00 AM and 12:00 PM PET time (2:00 PM–5:00 PM GMT). That is roughly 3 hours of usable overlap.
Keeping family and friends in sync: knowing that 8:00 PM in PET is 1:00 AM in GMT makes it easy to avoid calling at 3 AM.

Always state the zone abbreviation, not just the hour. "3:00 PM PET" is unambiguous; "3 PM" across a +5h gap is not.
Block 9:00 AM–12:00 PM PET as the recurring meeting window if you work primarily from PET and need GMT colleagues present.

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 GMT (Greenwich Mean Time)

Greenwich Mean Time (GMT) is the clock time at the Royal Observatory in Greenwich, London, which sits on the Prime Meridian (0° longitude). GMT serves as the reference point from which all other time zones are calculated. The United Kingdom uses GMT during winter months and switches to British Summer Time (BST, UTC+01:00) from late March to late October. Several West African nations use GMT year-round. GMT is often used interchangeably with UTC (Coordinated Universal Time), although technically they are different – UTC is based on atomic clocks while GMT is based on Earth's rotation.

Best time to call between PET and GMT

Both PET and GMT sit inside the 9 AM – 5 PM working day between 9:00 AM–12:00 PM PET, which is 2:00 PM–5:00 PM GMT. That gives roughly 3 hours of shared time — the safest window for a live call or meeting.

Business hours overlap

PET and GMT overlap for about 3 hours during the working day — enough for meetings if you avoid the edges of the window.

PET is 5 hours ahead of GMT (PET UTC-05:00 → GMT UTC+00:00). The shared working window is 9:00 AM–12:00 PM PET. Remember to re-check around daylight-saving transitions.

🕐 Daylight Saving Time Info

PET

Does not observe DST

GMT

☀ Currently in DST

Standard: UTC+00:00 · DST: UTC+01:00

Clocks fall back on Sun, Oct 25, 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 PET and GMT?

PET (PET, UTC-05:00) is 5 hours ahead of GMT (GMT, UTC+00:00). The gap is currently +5h.

How do I convert PET time to GMT time?

Add +5h to PET local time. For example, 9:00 AM in PET is 2:00 PM in GMT.

What time is it in GMT right now?

GMT uses GMT at UTC+00:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +5h offset from PET.

What is the best time to call GMT from PET?

Call between 9:00 AM and 12:00 PM PET — that maps to 2:00 PM–5:00 PM GMT and keeps both parties inside the working day.

Which is ahead, PET or GMT?

PET is 5 hours ahead of GMT. When it is 12:00 PM in PET it is 5:00 PM in GMT.

Does daylight saving time affect the PET–GMT difference?

Neither zone observes daylight saving time, so the +5h offset between PET and GMT 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 GMT?

Not normally. The +5h gap only pushes the date over for late-evening times.

What is the time difference between PET and GMT?

GMT is +5h from PET.

What timezone is PET in?

PET operates on its local timezone.

What timezone is GMT in?

GMT operates on its local timezone.

Which countries use PET (Peru Time)?

PET is used in Peru.

Does PET observe daylight saving time?

No, PET does not observe daylight saving time and remains at UTC-05:00 year-round.

What are some interesting facts about PET?

Peru does not observe daylight saving time. PET is the same offset as EST (UTC-05:00).

Which cities are in the GMT timezone?

Major cities in the GMT timezone include London, Dublin, Lisbon, Accra, Reykjavik, Edinburgh, Casablanca, Dakar.

What is the UTC offset for GMT?

Greenwich Mean Time (GMT) is at UTC+00:00. During daylight saving time, it shifts to BST.

What should I know about the GMT timezone?

GMT is based on the Prime Meridian (0° longitude) passing through Greenwich, London. The Royal Observatory in Greenwich has been the reference point for GMT since 1884.