Ferramentas Intosoft

PET to AST

+1h

PET

PETSOURCE
UTC-05:00
HH12
:
MM00
  
12:00 (24-hr)
12 AM6 AM12 PM6 PM12 AM

AST

AST
UTC-03:00☀ DST active
HH01
:
MM00
  
13:00 (24-hr)
12 AM6 AM12 PM6 PM12 AM
PET
AST
12:00 AM
2:00 AM
2:00 AM
4:00 AM
4:00 AM
6:00 AM
6:00 AM
8:00 AM
8:00 AM
10:00 AM
10:00 AM
12:00 PM
12:00 PM
2:00 PM
2:00 PM
4:00 PM
4:00 PM
6:00 PM
6:00 PM
8:00 PM
8:00 PM
10:00 PM
10:00 PM
12:00 AM+1

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

PET and AST on the World Map

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

PETASTLimaArequipaTrujilloCuscoHalifaxSan JuanSanto DomingoCaracas
PET Zone
→
AST 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

AST – Atlantic Standard Time

UTC-04:00

Atlantic Standard Time (AST) is the time zone for the Canadian Atlantic provinces and the Caribbean, 4 hours behind UTC.

Countries in AST
Canada (Atlantic provinces)Puerto RicoUS Virgin IslandsDominican RepublicVenezuelaBoliviaBarbadosTrinidad and Tobago
Major Cities in AST
HalifaxSan JuanSanto DomingoCaracasLa PazFrederictonCharlottetown
Key Facts about AST
  • •Puerto Rico uses AST year-round and does not observe DST.
  • •AST is 1 hour ahead of EST.
  • •Halifax, the capital of Nova Scotia, is the largest city in AST Canada.
Daylight Saving:Yes – switches to ADT
Learn more about AST on Wikipedia

Comparing Time Zones: PET and AST

PET runs on Peru Time (PET) at UTC-05:00. AST runs on Atlantic Standard Time (AST) at UTC-04:00. That puts PET 1 hour ahead of AST — a difference of +1h at the current offsets.

In practice, when it is 9:00 AM in PET it is 10:00 AM in AST. Midnight in PET is 1:00 AM in AST. Neither zone observes daylight saving time, so the offset between them stays constant all year.

PET to AST time conversion table

PET (PET)AST (AST)Day
12:00 AM1:00 AMsame day
6:00 AM7:00 AMsame day
7:00 AM8:00 AMsame day
8:00 AM9:00 AMsame day
9:00 AM10:00 AMsame day
12:00 PM1:00 PMsame day
3:00 PM4:00 PMsame day
5:00 PM6:00 PMsame day
6:00 PM7:00 PMsame day
9:00 PM10:00 PMsame day

Why people convert PET to AST time

  • Scheduling a call from PET to AST: a 10:00 AM start in PET lands at 11:00 AM in AST, so you can confirm the slot without doing the arithmetic yourself.
  • Finding shared working hours: both PET and AST are inside the 9-to-5 working day between 9:00 AM and 4:00 PM PET time (10:00 AM–5:00 PM AST). That is roughly 7 hours of usable overlap.
  • Coordinating a PET-based team with AST 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 PET" is unambiguous; "3 PM" across a +1h gap is not.
  • Block 9:00 AM–4:00 PM PET as the recurring meeting window if you work primarily from PET and need AST 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 AST (Atlantic Standard Time)

Atlantic Standard Time (AST) covers Canada's Atlantic provinces (Nova Scotia, New Brunswick, Prince Edward Island, and most of Labrador), as well as several Caribbean nations. Puerto Rico and the US Virgin Islands use AST year-round without daylight saving time. The Canadian provinces switch to Atlantic Daylight Time (ADT) in summer.

Best time to call between PET and AST

Both PET and AST sit inside the 9 AM – 5 PM working day between 9:00 AM–4:00 PM PET, which is 10:00 AM–5:00 PM AST. That gives roughly 7 hours of shared time — the safest window for a live call or meeting.

Business hours overlap

PET and AST share 7 hours of working-hours overlap (9:00 AM–4:00 PM PET), so scheduling a live meeting is straightforward.

PET is 1 hour ahead of AST (PET UTC-05:00 → AST UTC-04:00). The shared working window is 9:00 AM–4:00 PM PET. Remember to re-check around daylight-saving transitions.

🕐 Daylight Saving Time Info

PET

Does not observe DST

AST

☀ Currently in DST

Standard: UTC-04:00 · DST: UTC-03:00

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 PET and AST?

PET (PET, UTC-05:00) is 1 hour ahead of AST (AST, UTC-04:00). The gap is currently +1h.

How do I convert PET time to AST time?

Add +1h to PET local time. For example, 9:00 AM in PET is 10:00 AM in AST.

What time is it in AST right now?

AST uses AST at UTC-04:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +1h offset from PET.

What is the best time to call AST from PET?

Call between 9:00 AM and 4:00 PM PET — that maps to 10:00 AM–5:00 PM AST and keeps both parties inside the working day.

Which is ahead, PET or AST?

PET is 1 hour ahead of AST. When it is 12:00 PM in PET it is 1:00 PM in AST.

Does daylight saving time affect the PET–AST difference?

Neither zone observes daylight saving time, so the +1h offset between PET and AST 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 AST?

Not normally. The +1h gap only pushes the date over for late-evening times.

What is the time difference between PET and AST?

AST is +1h from PET.

What timezone is PET in?

PET operates on its local timezone.

What timezone is AST in?

AST 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 AST timezone?

Major cities in the AST timezone include Halifax, San Juan, Santo Domingo, Caracas, La Paz, Fredericton, Charlottetown.

What is the UTC offset for AST?

Atlantic Standard Time (AST) is at UTC-04:00. During daylight saving time, it shifts to ADT.

What should I know about the AST timezone?

Puerto Rico uses AST year-round and does not observe DST. AST is 1 hour ahead of EST.

When is it midnight in PET, what time is it in AST?

When it is 12:00 AM (midnight) in PET (PET), it is +1h later in AST (AST).

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