ACST to PKT
-4h 30mACST
ACSTSOURCEPKT
PKTGreen rows indicate typical business hours (9 AM - 5 PM)
ACST and PKT on the World Map
The map below highlights the ACST (Australian Central Standard Time) and PKT (Pakistan Standard 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.
PKT – Pakistan Standard Time
UTC+05:00Pakistan Standard Time (PKT) is the time zone for Pakistan, 5 hours ahead of UTC.
- •Pakistan does not observe daylight saving time.
- •Karachi is one of the world's most populous cities.
- •PKT is the same offset as Uzbekistan (UZT) and Yekaterinburg (YEKT).
ACST vs PKT: Offsets, DST and Best Call Times
ACST runs on Australian Central Standard Time (ACST) at UTC+09:30. PKT runs on Pakistan Standard Time (PKT) at UTC+05:00. That puts ACST 4 hours 30 minutes behind PKT — a difference of -4h 30m at the current offsets.
In practice, when it is 9:00 AM in ACST it is 4:30 AM in PKT. Midnight in ACST is 7:30 PM in PKT. Neither zone observes daylight saving time, so the offset between them stays constant all year.
ACST to PKT time conversion table
| ACST (ACST) | PKT (PKT) | Day |
|---|---|---|
| 12:00 AM | 7:30 PM | previous day |
| 6:00 AM | 1:30 AM | same day |
| 7:00 AM | 2:30 AM | same day |
| 8:00 AM | 3:30 AM | same day |
| 9:00 AM | 4:30 AM | same day |
| 12:00 PM | 7:30 AM | same day |
| 3:00 PM | 10:30 AM | same day |
| 5:00 PM | 12:30 PM | same day |
| 6:00 PM | 1:30 PM | same day |
| 9:00 PM | 4:30 PM | same day |
Why people convert ACST to PKT time
- Scheduling a call from ACST to PKT: a 10:00 AM start in ACST lands at 5:30 AM in PKT, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both ACST and PKT are inside the 9-to-5 working day between 1:30 PM and 5:00 PM ACST time (9:00 AM–12:30 PM PKT). That is roughly 3 hours 30 minutes of usable overlap.
- Booking travel or deliveries: tracking PKT local time against ACST keeps pickup windows and arrival estimates honest across the -4h 30m offset.
- Always state the zone abbreviation, not just the hour. "3:00 PM ACST" is unambiguous; "3 PM" across a -4h 30m gap is not.
- Block 1:30 PM–5:00 PM ACST as the recurring meeting window if you work primarily from ACST and need PKT 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 PKT (Pakistan Standard Time)
Pakistan Standard Time (PKT) is the time zone used throughout Pakistan. PKT does not observe daylight saving time. Pakistan is the 5th most populous country in the world.
Best time to call between ACST and PKT
Both ACST and PKT sit inside the 9 AM – 5 PM working day between 1:30 PM–5:00 PM ACST, which is 9:00 AM–12:30 PM PKT. That gives roughly 3 hours and 30 minutes of shared time — the safest window for a live call or meeting.
Business hours overlap
ACST and PKT overlap for about 3 hours during the working day — enough for meetings if you avoid the edges of the window.
ACST is 4 hours 30 minutes behind PKT (ACST UTC+09:30 → PKT UTC+05:00). The shared working window is 1:30 PM–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
PKT
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 PKT?
ACST (ACST, UTC+09:30) is 4 hours 30 minutes behind PKT (PKT, UTC+05:00). The gap is currently -4h 30m.
How do I convert ACST time to PKT time?
Add -4h 30m to ACST local time. For example, 9:00 AM in ACST is 4:30 AM in PKT.
What time is it in PKT right now?
PKT uses PKT at UTC+05:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -4h 30m offset from ACST.
What is the best time to call PKT from ACST?
Call between 1:30 PM and 5:00 PM ACST — that maps to 9:00 AM–12:30 PM PKT and keeps both parties inside the working day.
Which is behind, ACST or PKT?
ACST is 4 hours 30 minutes behind PKT. When it is 12:00 PM in ACST it is 7:30 AM in PKT.
Does daylight saving time affect the ACST–PKT difference?
Neither zone observes daylight saving time, so the -4h 30m offset between ACST and PKT 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 PKT?
Not normally. The -4h 30m gap only pushes the date over the previous day.
What is the time difference between ACST and PKT?
PKT is -4h 30m from ACST.
What timezone is ACST in?
ACST operates on its local timezone.
What timezone is PKT in?
PKT 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 PKT timezone?
Major cities in the PKT timezone include Karachi, Lahore, Islamabad, Rawalpindi, Faisalabad, Peshawar.
What is the UTC offset for PKT?
Pakistan Standard Time (PKT) is at UTC+05:00.
What should I know about the PKT timezone?
Pakistan does not observe daylight saving time. Karachi is one of the world's most populous cities.
When is it midnight in ACST, what time is it in PKT?
When it is 12:00 AM (midnight) in ACST (ACST), it is -4h 30m later in PKT (PKT).
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See every conversion from ACST →·See every conversion from PKT →