ACST to PET
-14h 30mACST
ACSTSOURCEPET
PETGreen rows indicate typical business hours (9 AM - 5 PM)
ACST and PET on the World Map
The map below highlights the ACST (Australian Central Standard Time) and PET (Peru Time) timezone regions across the globe.
ACST – Australian Central Standard Time
UTC+09:30Australian Central Standard Time (ACST, UTC+09:30) covers South Australia and the Northern Territory, on a half-hour offset.
- •ACST uses a half-hour offset: UTC+09:30.
- •South Australia moves to ACDT (UTC+10:30) in summer; the Northern Territory does not.
- •Adelaide and Darwin are 30 minutes apart during daylight saving, level in winter.
- •Adelaide is one of the few major cities on a 30-minute offset.
PET – Peru Time
UTC-05:00Peru Time (PET) is the standard time for Peru, 5 hours behind UTC.
- •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.
Time Conversion Guide: ACST to PET
ACST runs on Australian Central Standard Time (ACST) at UTC+09:30. PET runs on Peru Time (PET) at UTC-05:00. That puts ACST 14 hours 30 minutes behind PET — a difference of -14h 30m at the current offsets.
In practice, when it is 9:00 AM in ACST it is 6:30 PM in PET on the previous day. Midnight in ACST is 9:30 AM in PET. Neither zone observes daylight saving time, so the offset between them stays constant all year.
ACST to PET time conversion table
| ACST (ACST) | PET (PET) | Day |
|---|---|---|
| 12:00 AM | 9:30 AM | previous day |
| 6:00 AM | 3:30 PM | previous day |
| 7:00 AM | 4:30 PM | previous day |
| 8:00 AM | 5:30 PM | previous day |
| 9:00 AM | 6:30 PM | previous day |
| 12:00 PM | 9:30 PM | previous day |
| 3:00 PM | 12:30 AM | same day |
| 5:00 PM | 2:30 AM | same day |
| 6:00 PM | 3:30 AM | same day |
| 9:00 PM | 6:30 AM | same day |
Why people convert ACST to PET time
- Scheduling a call from ACST to PET: a 10:00 AM start in ACST lands at 7:30 PM in PET the previous day, so you can confirm the slot without doing the arithmetic yourself.
- Handling a -14h 30m gap: ACST and PET 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 PET is 6:30 PM in ACST.
- Booking travel or deliveries: tracking PET local time against ACST keeps pickup windows and arrival estimates honest across the -14h 30m offset.
- Always state the zone abbreviation, not just the hour. "3:00 PM ACST" is unambiguous; "3 PM" across a -14h 30m gap is not.
- With a -14h 30m gap there is no shared 9-to-5 window, so alternate the early start: one week ACST takes the early slot, the next week PET does.
About ACST (Australian Central Standard Time)
Australian Central Standard Time (ACST) is the half-hour offset of UTC+09:30 used across South Australia and the Northern Territory, taking in Adelaide and Darwin. South Australia moves to Australian Central Daylight Time (ACDT, UTC+10:30) from the first Sunday in October to the first Sunday in April, but the Northern Territory does not observe daylight saving — so Adelaide and Darwin sit 30 minutes apart in summer and level with each other in winter. The half-hour offset means Adelaide is 30 minutes behind Sydney in winter and level with it during daylight saving, which regularly catches out travellers and meeting planners.
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.
Best time to call between ACST and PET
With a -14h 30m offset there is no overlap inside a normal 9 AM – 5 PM day. PET opens at 9:00 AM PET, which is 6:30 PM in ACST, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
ACST and PET have no shared working hours because of the -14h 30m gap. Teams need to alternate early starts or rely on asynchronous handovers.
ACST is 14 hours 30 minutes behind PET (ACST UTC+09:30 → PET UTC-05:00). There is no shared 9-to-5 window, so plan around an early or late slot. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
ACST
❄ Currently in Standard Time
Standard: UTC+09:30 · DST: UTC+10:30
Clocks spring forward on Sat, Oct 3, 2026
PET
Does not observe DST
Learn More About Time
Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:
Frequently Asked Questions
What is the time difference between ACST and PET?
ACST (ACST, UTC+09:30) is 14 hours 30 minutes behind PET (PET, UTC-05:00). The gap is currently -14h 30m.
How do I convert ACST time to PET time?
Add -14h 30m to ACST local time. For example, 9:00 AM in ACST is 6:30 PM in PET (previous day).
What time is it in PET right now?
PET uses PET at UTC-05:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -14h 30m offset from ACST.
What is the best time to call PET from ACST?
There is no shared working-hours window because of the -14h 30m gap. The closest option is 1:00 PM in ACST, which is 10:30 PM in PET.
Which is behind, ACST or PET?
ACST is 14 hours 30 minutes behind PET. When it is 12:00 PM in ACST it is 9:30 PM in PET.
Does daylight saving time affect the ACST–PET difference?
Neither zone observes daylight saving time, so the -14h 30m offset between ACST and PET is fixed all year.
Which other cities share ACST's time zone?
ACST also covers Adelaide, Darwin, Alice Springs, Mount Gambier.
Which countries use ACST, ACST's zone?
ACST is used in Australia (South Australia, Northern Territory).
Is there a day difference between ACST and PET?
Sometimes. The -14h 30m gap is large enough that 8:00 PM or later in ACST already falls on the in PET.
What is the time difference between ACST and PET?
PET is -14h 30m from ACST.
What timezone is ACST in?
ACST operates on its local timezone.
What timezone is PET in?
PET operates on its local timezone.
Which countries use ACST (Australian Central Standard Time)?
ACST is used in Australia (South Australia, Northern Territory).
Does ACST observe daylight saving time?
Yes, ACST switches to ACDT during summer months.
What are some interesting facts about ACST?
ACST uses a half-hour offset: UTC+09:30. South Australia moves to ACDT (UTC+10:30) in summer; the Northern Territory does not.
Which cities are in the PET timezone?
Major cities in the PET timezone include Lima, Arequipa, Trujillo, Cusco, Callao.
What is the UTC offset for PET?
Peru Time (PET) is at UTC-05:00.
What should I know about the PET timezone?
Peru does not observe daylight saving time. PET is the same offset as EST (UTC-05:00).
When is it midnight in ACST, what time is it in PET?
When it is 12:00 AM (midnight) in ACST (ACST), it is -14h 30m later in PET (PET).
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See every conversion from ACST →·See every conversion from PET →