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 GST

+9h

PET

PETSOURCE

UTC-05:00

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

GST

UTC+04:00

HH09

MM00

21:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

PET

GST

12:00 AM

9:00 AM

2:00 AM

11:00 AM

4:00 AM

1:00 PM

6:00 AM

3:00 PM

8:00 AM

5:00 PM

10:00 AM

7:00 PM

12:00 PM

9:00 PM

2:00 PM

11:00 PM

4:00 PM

1:00 AM+1

6:00 PM

3:00 AM+1

8:00 PM

5:00 AM+1

10:00 PM

7:00 AM+1

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

PET and GST on the World Map

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

PET Zone

→

GST 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

GST – Gulf Standard Time

UTC+04:00

Gulf Standard Time (GST) is used in the UAE, Oman, and other Gulf states, 4 hours ahead of UTC.

Countries in GST

UAEOmanGeorgiaAzerbaijanMauritius

Major Cities in GST

DubaiAbu DhabiMuscatBakuTbilisi

Key Facts about GST

•Dubai uses GST year-round with no daylight saving time.
•GST is 9 hours ahead of EST and 4 hours ahead of GMT.
•The Dubai Financial Market (DFM) operates on GST.

Daylight Saving:No – UTC+04:00 year-round

Learn more about GST on Wikipedia

Comparing Time Zones: PET and GST

PET runs on Peru Time (PET) at UTC-05:00. GST runs on Gulf Standard Time (GST) at UTC+04:00. That puts PET 9 hours ahead of GST — a difference of +9h at the current offsets.

In practice, when it is 9:00 AM in PET it is 6:00 PM in GST. Midnight in PET is 9:00 AM in GST. Neither zone observes daylight saving time, so the offset between them stays constant all year.

PET to GST time conversion table

PET (PET)	GST (GST)	Day
12:00 AM	9:00 AM	same day
6:00 AM	3:00 PM	same day
7:00 AM	4:00 PM	same day
8:00 AM	5:00 PM	same day
9:00 AM	6:00 PM	same day
12:00 PM	9:00 PM	same day
3:00 PM	12:00 AM	next day
5:00 PM	2:00 AM	next day
6:00 PM	3:00 AM	next day
9:00 PM	6:00 AM	next day

Why people convert PET to GST time

Scheduling a call from PET to GST: a 10:00 AM start in PET lands at 7:00 PM in GST, so you can confirm the slot without doing the arithmetic yourself.
Handling a +9h gap: PET and GST 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 GST is 6:00 PM in PET.
Keeping family and friends in sync: knowing that 8:00 PM in PET is 5:00 AM in GST 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 +9h gap is not.
With a +9h gap there is no shared 9-to-5 window, so alternate the early start: one week PET takes the early slot, the next week GST 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 GST (Gulf Standard Time)

Gulf Standard Time (GST) is the time zone used in the United Arab Emirates, Oman, and other Gulf states. GST does not observe daylight saving time. Dubai and Abu Dhabi, major international business and tourism hubs, operate on GST.

Best time to call between PET and GST

With a +9h offset there is no overlap inside a normal 9 AM – 5 PM day. GST opens at 9:00 AM GST, which is 6:00 PM in PET, so real-time calls need an early-morning or late-evening slot on one side.

Business hours overlap

PET and GST have no shared working hours because of the +9h gap. Teams need to alternate early starts or rely on asynchronous handovers.

PET is 9 hours ahead of GST (PET UTC-05:00 → GST UTC+04:00). There is no shared 9-to-5 window, so plan around an early or late slot. Remember to re-check around daylight-saving transitions.