AST to PET Converter & Meeting Planner
Quick answer: 9:00 AM AST = 8:00 AM PET (fixed -04:00 standard offset — not DST-adjusted). Use the interactive converter below for DST-aware local-time scheduling.
Planning a call or meeting between Atlantic Standard Time (AST) and Peru Time (PET)? You need to account for the standard time difference. Peru Time is normally 1 hours behind Atlantic Standard Time. Whether you are coordinating between teams in Halifax and San Juan and Lima and Arequipa, our live tool has you covered. Use our interactive overlap studio below to find the perfect waking hours for both regions, taking into account any seasonal Daylight Saving Time (DST) changes.
24-Hour Conversion Table
Quick reference: 12:00 AM AST = 11:00 PM PET. The full 24-hour AST to PET table below uses fixed standard offsets for exact abbreviation searches.
Example: 3:00 PM AST = 2:00 PM PET.
| AST Time | PET Time |
|---|---|
| 12:00 AM (00:00) | 11:00 PM (23:00)-1 day |
| 1:00 AM (01:00) | 12:00 AM (00:00) |
| 2:00 AM (02:00) | 1:00 AM (01:00) |
| 3:00 AM (03:00) | 2:00 AM (02:00) |
| 4:00 AM (04:00) | 3:00 AM (03:00) |
| 5:00 AM (05:00) | 4:00 AM (04:00) |
| 6:00 AM (06:00) | 5:00 AM (05:00) |
| 7:00 AM (07:00) | 6:00 AM (06:00) |
| 8:00 AM (08:00) | 7:00 AM (07:00) |
| 9:00 AM (09:00) | 8:00 AM (08:00) |
| 10:00 AM (10:00) | 9:00 AM (09:00) |
| 11:00 AM (11:00) | 10:00 AM (10:00) |
| 12:00 PM (12:00) | 11:00 AM (11:00) |
| 1:00 PM (13:00) | 12:00 PM (12:00) |
| 2:00 PM (14:00) | 1:00 PM (13:00) |
| 3:00 PM (15:00) | 2:00 PM (14:00) |
| 4:00 PM (16:00) | 3:00 PM (15:00) |
| 5:00 PM (17:00) | 4:00 PM (16:00) |
| 6:00 PM (18:00) | 5:00 PM (17:00) |
| 7:00 PM (19:00) | 6:00 PM (18:00) |
| 8:00 PM (20:00) | 7:00 PM (19:00) |
| 9:00 PM (21:00) | 8:00 PM (20:00) |
| 10:00 PM (22:00) | 9:00 PM (21:00) |
| 11:00 PM (23:00) | 10:00 PM (22:00) |
Best time to call Lima from Halifax
For most work calls, compare the normal business day in Halifax (AST) with the business day in Lima (PET). AST commonly covers North America, Caribbean, while PET is mainly associated with South America.
⚠️ Note: 2026-07-05 is not a normal workday in one or both regions based on their configured calendar. The overlap below should be treated as a reference, not a guaranteed office-hours window.
✅ The most practical overlap on 2026-07-05 is usually 11:00 AM - 5:00 PM AST, which corresponds to 9:00 AM - 3:00 PM PET. This window sits inside the typical AST workday (9:00 AM - 5:00 PM) and the PET workday (9:00 AM - 6:00 PM).
- DST Safety: AST or PET may shift during Daylight Saving Time. Always confirm the converted time for your specific date.
- Lima Stock Exchange (BVL): 09:00-15:00 local time in Lima.
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Frequently Asked Questions
What is the time difference between AST and PET?
During standard time, Peru Time is 1 hours behind Atlantic Standard Time.
Does the Caribbean observe Daylight Saving Time?
The vast majority of Caribbean nations and territories — including Puerto Rico, the Dominican Republic, the US Virgin Islands, Trinidad and Tobago, and Barbados — do not observe Daylight Saving Time and remain on AST (UTC-4) year-round. This means these territories share the same clock as Halifax only during the Atlantic Standard Time window in winter, diverging by one hour once Canada and Bermuda advance to ADT each spring.
What is the difference between AST and ADT?
AST (Atlantic Standard Time) is the standard winter offset at UTC-4:00, observed from the first Sunday in November through the second Sunday in March across all AST regions. ADT (Atlantic Daylight Time) is the summer offset at UTC-3:00, applied by Eastern Canadian provinces and Bermuda when they advance their clocks by one hour during Daylight Saving Time.
Does Peru observe Daylight Saving Time?
Peru does not observe Daylight Saving Time and has not done so since 1994. PET remains fixed at UTC-05:00 throughout the entire year, with no seasonal clock changes affecting business hours, market schedules, or international coordination.
How does Peru Time (PET) align with the US?
PET (UTC-05:00) is identical to US Eastern Standard Time (EST) during the Northern Hemisphere winter — Lima and New York run on the exact same clock. When the US shifts to Eastern Daylight Time (EDT, UTC-04:00) in summer, PET falls one hour behind, but a full shared workday between Peru and the US East Coast remains entirely achievable without scheduling concessions on either side.