ACST to Philippines
-1h 30mACST
ACSTSOURCEPhilippines
PHTGreen rows indicate typical business hours (9 AM - 5 PM)
ACST and PHT on the World Map
The map below highlights the ACST (Australian Central Standard Time) and PHT (Philippine 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.
PHT – Philippine Time
UTC+08:00Philippine Time (PHT, UTC+08:00) is the time zone for the Philippines, 8 hours ahead of UTC.
- •Philippine Time does not observe daylight saving, so UTC+08:00 is fixed all year.
- •PHT shares its offset with China, Hong Kong, Singapore and Malaysia.
- •Manila is one of the largest outsourcing hubs in the world.
- •The Philippines spans one time zone despite being an archipelago of over 7,600 islands.
Time Conversion Guide: ACST to Philippines
ACST runs on Australian Central Standard Time (ACST) at UTC+09:30. Philippines runs on Philippine Standard Time (PHT) at UTC+08:00. That puts ACST 1 hour 30 minutes behind Philippines — a difference of -1h 30m at the current offsets.
In practice, when it is 9:00 AM in ACST it is 7:30 AM in Philippines. Midnight in ACST is 10:30 PM in Philippines. Neither zone observes daylight saving time, so the offset between them stays constant all year.
ACST to Philippines time conversion table
| ACST (ACST) | Philippines (PHT) | Day |
|---|---|---|
| 12:00 AM | 10:30 PM | previous day |
| 6:00 AM | 4:30 AM | same day |
| 7:00 AM | 5:30 AM | same day |
| 8:00 AM | 6:30 AM | same day |
| 9:00 AM | 7:30 AM | same day |
| 12:00 PM | 10:30 AM | same day |
| 3:00 PM | 1:30 PM | same day |
| 5:00 PM | 3:30 PM | same day |
| 6:00 PM | 4:30 PM | same day |
| 9:00 PM | 7:30 PM | same day |
Why people convert ACST to Philippines time
- Scheduling a call from ACST to Philippines: a 10:00 AM start in ACST lands at 8:30 AM in Philippines, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both ACST and Philippines are inside the 9-to-5 working day between 10:30 AM and 5:00 PM ACST time (9:00 AM–3:30 PM PHT). That is roughly 6 hours 30 minutes of usable overlap.
- Booking travel or deliveries: tracking Philippines local time against ACST keeps pickup windows and arrival estimates honest across the -1h 30m offset.
- Always state the zone abbreviation, not just the hour. "3:00 PM ACST" is unambiguous; "3 PM" across a -1h 30m gap is not.
- Block 10:30 AM–5:00 PM ACST as the recurring meeting window if you work primarily from ACST and need Philippines colleagues present.
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 PHT (Philippine Time)
Philippine Time (PHT) is fixed at UTC+08:00 all year. The Philippines has not observed daylight saving time since 1978, apart from a brief trial in 1990. PHT shares its offset with China Standard Time, Hong Kong Time, Singapore Time, Malaysian Time and Australian Western Standard Time, which makes Manila a convenient bridge for scheduling across East and Southeast Asia. As one of the world's largest centres for business process outsourcing, Manila keeps overlapping hours with both Australia and, on early shifts, the United States, and its contact-centre schedules are usually planned around Manila local time.
Best time to call between ACST and Philippines
Both ACST and Philippines sit inside the 9 AM – 5 PM working day between 10:30 AM–5:00 PM ACST, which is 9:00 AM–3:30 PM PHT. That gives roughly 6 hours and 30 minutes of shared time — the safest window for a live call or meeting.
Business hours overlap
ACST and Philippines share 6 hours of working-hours overlap (10:30 AM–5:00 PM ACST), so scheduling a live meeting is straightforward.
ACST is 1 hour 30 minutes behind Philippines (ACST UTC+09:30 → PHT UTC+08:00). The shared working window is 10:30 AM–5:00 PM ACST. 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
Philippines
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 Philippines?
ACST (ACST, UTC+09:30) is 1 hour 30 minutes behind Philippines (PHT, UTC+08:00). The gap is currently -1h 30m.
How do I convert ACST time to Philippines time?
Add -1h 30m to ACST local time. For example, 9:00 AM in ACST is 7:30 AM in Philippines.
What time is it in Philippines right now?
Philippines uses PHT at UTC+08:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -1h 30m offset from ACST.
What is the best time to call Philippines from ACST?
Call between 10:30 AM and 5:00 PM ACST — that maps to 9:00 AM–3:30 PM PHT and keeps both parties inside the working day.
Which is behind, ACST or Philippines?
ACST is 1 hour 30 minutes behind Philippines. When it is 12:00 PM in ACST it is 10:30 AM in Philippines.
Do ACST and Philippines use different time zones?
ACST uses ACST at UTC+09:30, while Philippines (Philippines) uses PHT at UTC+08:00. The IANA identifiers are Australia/Adelaide and Asia/Manila.
Does daylight saving time affect the ACST–Philippines difference?
Neither zone observes daylight saving time, so the -1h 30m offset between ACST and Philippines 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 Philippines?
Not normally. The -1h 30m gap only pushes the date over the previous day.
What is the time difference between ACST and Philippines?
Philippines is -1h 30m from ACST.
What timezone is ACST in?
ACST operates on its local timezone.
What timezone is Philippines in?
Philippines 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 PHT timezone?
Major cities in the PHT timezone include Manila, Quezon City, Davao City, Cebu City, Zamboanga.
What is the UTC offset for PHT?
Philippine Time (PHT) is at UTC+08:00.
What should I know about the PHT timezone?
Philippine Time does not observe daylight saving, so UTC+08:00 is fixed all year. PHT shares its offset with China, Hong Kong, Singapore and Malaysia.
When is it midnight in ACST, what time is it in Philippines?
When it is 12:00 AM (midnight) in ACST (ACST), it is -1h 30m later in Philippines (PHT).
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