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AST to PET Converter

Updating current time…
ADT/AST
Atlantic Daylight Time
GMT -3
12am
3am
6am
9am
12pm
3pm
6pm
9pm
Atlantic Time is on daylight saving time: ADT (UTC−3) until Sun, Nov 1.
Use AST all year (UTC−4)
PET
Peru Time
GMT -5
12am
3am
6am
9am
12pm
3pm
6pm
9pm

Quick answers

Selected conversion

9:00 am09:00 ADT (UTC-3), Oct 11, 2026 = 7:00 am07:00 PET (UTC-5), Oct 11, 2026

ADT is 2 hours ahead of PET.

AST and PET examples

These examples always use AST (UTC-4) and PET (UTC-5). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.

AST is 1 hour ahead of PET.

How the time difference changes

For most of the year, ADT is 2 hours ahead of PET. At other times of the year, AST is 1 hour ahead of PET.

For most of the year, working hours of 9:00 am to 5:00 pm in ADT correspond to 7:00 am to 3:00 pm in PET. At other times of the year, working hours of 9:00 am to 5:00 pm in AST correspond to 8:00 am to 4:00 pm in PET.For most of the year, working hours of 09:00 to 17:00 in ADT correspond to 07:00 to 15:00 in PET. At other times of the year, working hours of 09:00 to 17:00 in AST correspond to 08:00 to 16:00 in PET.

Compare AST time with PET time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.

Time Difference

Atlantic Daylight Time is 2 hours ahead of Peru Time.
9:00 am09:00 in ADT is 7:00 am07:00 in PET

ADT to PET call time
Best time for a conference call or a meeting is between 11am-5pm11:00-17:00 in ADT which corresponds to 9am-3pm09:00-15:00 in PET

9:00 am09:00 Atlantic Daylight Time (ADT). Offset UTC -3:00 hours
7:00 am07:00 Peru Time (PET). Offset UTC -5:00 hours

9:00 am09:00 ADT / 7:00 am07:00 PET

ADTPET
12:00am10:00pm
1:00am11:00pm
2:00am12:00am
3:00am1:00am
4:00am2:00am
5:00am3:00am
6:00am4:00am
7:00am5:00am
8:00am6:00am
9:00am7:00am
10:00am8:00am
11:00am9:00am
12:00pm10:00am
1:00pm11:00am
2:00pm12:00pm
3:00pm1:00pm
4:00pm2:00pm
5:00pm3:00pm
6:00pm4:00pm
7:00pm5:00pm
8:00pm6:00pm
9:00pm7:00pm
10:00pm8:00pm
11:00pm9:00pm
00:0022:00
01:0023:00
02:0000:00
03:0001:00
04:0002:00
05:0003:00
06:0004:00
07:0005:00
08:0006:00
09:0007:00
10:0008:00
11:0009:00
12:0010:00
13:0011:00
14:0012:00
15:0013:00
16:0014:00
17:0015:00
18:0016:00
19:0017:00
20:0018:00
21:0019:00
22:0020:00
23:0021:00

Atlantic Standard Time

Offset: AST is 4 hours behind Greenwich Mean Time (GMT) and is used in North America

Countries using this time zone: Antigua & Barbuda, Anguilla, Aruba, Barbados, St Barthelemy, Bermuda, Caribbean NL, Canada, Curaçao, Dominica, Dominican Republic, Grenada, Greenland, Guadeloupe, St Kitts & Nevis, St Lucia, St Martin (French), Martinique, Montserrat, Puerto Rico, St Maarten (Dutch), Trinidad & Tobago, St Vincent, Virgin Islands (UK), Virgin Islands (US)

Principal Cities: The largest city in the AST time zone is Santo Domingo in Dominican Republic, with about 2.202 million people. Other major cities in this time zone include Santiago de los Caballeros, Santo Domingo Oeste, Halifax, San Juan.

French: HNA - Heure Normale de l'Atlantique

Spanish: AST - Tiempo Estándar del Atlántico

AST Time Zone Geo Map
AST timezone map

Daylight Saving: This is a standard time zone. During summer, some places set clocks forward one hour for daylight saving time and observe Atlantic Daylight Time (ADT).

Daylight saving time clock moves forward for one hourEnd: Atlantic Standard Time (AST) ended on Sunday, March 8, 2026 at 2:00 am02:00 local time and clocks were set one hour forward to Sunday, March 8, 2026, 3:00 am03:00 local daylight time instead. Standard time ends annually on the second Sunday of March.

Daylight saving time clock moves back for one hourStart: Atlantic Standard Time (AST) starts on Sunday, November 1, 2026 at 2:00 am02:00 local time and clocks are set one hour back to Sunday, November 1, 2026, 1:00 am01:00. Standard time starts annually on the first Sunday of November.

See upcoming clock changes worldwide.

AST representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • -04 - basic short
  • -0400 - basic
  • -04:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • -0400 - sign character (-) followed by a four digit time providing hours (04) and minutes (00) of the offset. Indicates an offset of four hours to the west of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Quebec - Military abbreviation for AST
  • Q - short form of 'Quebec'
IANA/Olson: Reflects AST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • America/Anguilla
  • America/Antigua
  • America/Aruba
  • America/Barbados
  • America/Blanc-Sablon
  • America/Curacao
  • America/Dominica
  • America/Glace_Bay
  • America/Goose_Bay
  • America/Grenada
  • America/Guadeloupe
  • America/Halifax
  • America/Kralendijk
  • America/Lower_Princes
  • America/Marigot
  • America/Martinique
  • America/Moncton
  • America/Montserrat
  • America/Port_of_Spain
  • America/Puerto_Rico
  • America/Santo_Domingo
  • America/St_Barthelemy
  • America/St_Kitts
  • America/St_Lucia
  • America/St_Thomas
  • America/St_Vincent
  • America/Thule
  • America/Tortola
  • America/Virgin
  • Atlantic/Bermuda
  • Canada/Atlantic
AST Abbreviation: Several time zones share AST abbreviation and it could refer to these time zones
  • Atlantic Standard Time - UTC -4
  • Arabia Standard Time - UTC +3
Time zones with the GMT -4 offset:
  • AST - Atlantic Standard Time
  • EDT - Eastern Daylight Time
  • AMT - Amazon Time
  • BOT - Bolivia Time
  • CDT - Cuba Daylight Time
  • CLT - Chile Standard Time
  • FKT - Falkland Island Time
  • GYT - Guyana Time
  • HLV - Hora Legal de Venezuela
  • PYT - Paraguay Time
  • Q - Quebec Time Zone
  • VET - Venezuelan Standard Time

Peru Time

Offset: PET is 5 hours behind Greenwich Mean Time (GMT) and is used in South America

Countries using this time zone: Peru

Principal Cities: The largest city in the PET time zone is Lima in Peru, with about 7.737 million people. Other major cities in this time zone include Callao, Arequipa, Trujillo, La Mochica baja.

Daylight Saving: Clocks in Peru Time (PET) do not change for daylight saving time, so PET stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter; see upcoming clock changes worldwide.

PET Time Zone Geo Map
PET timezone map

PET representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • -05 - basic short
  • -0500 - basic
  • -05:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • -0500 - sign character (-) followed by a four digit time providing hours (05) and minutes (00) of the offset. Indicates an offset of five hours to the west of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Romeo - Military abbreviation for PET
  • R - short form of 'Romeo'
Time zones with the GMT -5 offset:
  • CDT - Central Daylight Time
  • EST - Eastern Standard Time
  • ET - Eastern Time
  • COT - Colombia Time
  • CST - Cuba Standard Time
  • EASST - Easter Island Summer Time
  • ECT - Ecuador Time
  • PET - Peru Time
  • R - Romeo Time Zone
EST to ISTGMT to ESTPST to ESTEST to GMTPST to GMT