CAT to ACST
+7h 30mCAT
CATSOURCEACST
ACSTGreen rows indicate typical business hours (9 AM - 5 PM)
CAT and ACST on the World Map
The map below highlights the CAT (Central Africa Time) and ACST (Australian Central Standard Time) timezone regions across the globe.
CAT – Central Africa Time
UTC+02:00Central Africa Time (CAT, UTC+02:00) covers Zimbabwe, Zambia, Mozambique, Malawi and neighbouring countries.
- •Central Africa Time is fixed at UTC+02:00 with no daylight saving.
- •CAT matches South Africa Standard Time (SAST) all year.
- •It is the same offset as Central European Time in winter.
- •Harare is level with Johannesburg and one hour ahead of Lagos.
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.
CAT to ACST Time Difference – Complete Guide
CAT runs on Central Africa Time (CAT) at UTC+02:00. ACST runs on Australian Central Standard Time (ACST) at UTC+09:30. That puts CAT 7 hours 30 minutes ahead of ACST — a difference of +7h 30m at the current offsets.
In practice, when it is 9:00 AM in CAT it is 4:30 PM in ACST. Midnight in CAT is 7:30 AM in ACST. Neither zone observes daylight saving time, so the offset between them stays constant all year.
CAT to ACST time conversion table
| CAT (CAT) | ACST (ACST) | Day |
|---|---|---|
| 12:00 AM | 7:30 AM | same day |
| 6:00 AM | 1:30 PM | same day |
| 7:00 AM | 2:30 PM | same day |
| 8:00 AM | 3:30 PM | same day |
| 9:00 AM | 4:30 PM | same day |
| 12:00 PM | 7:30 PM | same day |
| 3:00 PM | 10:30 PM | same day |
| 5:00 PM | 12:30 AM | next day |
| 6:00 PM | 1:30 AM | next day |
| 9:00 PM | 4:30 AM | next day |
Why people convert CAT to ACST time
- Scheduling a call from CAT to ACST: a 10:00 AM start in CAT lands at 5:30 PM in ACST, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both CAT and ACST are inside the 9-to-5 working day between 9:00 AM and 9:30 AM CAT time (4:30 PM–5:00 PM ACST). That is roughly 0 hours 30 minutes of usable overlap.
- Booking travel or deliveries: tracking ACST local time against CAT keeps pickup windows and arrival estimates honest across the +7h 30m offset.
- Always state the zone abbreviation, not just the hour. "3:00 PM CAT" is unambiguous; "3 PM" across a +7h 30m gap is not.
- Block 9:00 AM–9:30 AM CAT as the recurring meeting window if you work primarily from CAT and need ACST colleagues present.
About CAT (Central Africa Time)
Central Africa Time (CAT) is fixed at UTC+02:00 all year across a broad belt of southern and central Africa, including Zimbabwe, Zambia, Mozambique, Malawi, Rwanda, Burundi and the eastern Democratic Republic of the Congo. None of these countries observes daylight saving time, so CAT never shifts. It is the same offset as South Africa Standard Time (SAST) and the winter version of Central European Time, which makes CAT a convenient bridge between African, European and Middle Eastern schedules — Harare is level with Johannesburg all year and one hour ahead of Lagos.
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.
Best time to call between CAT and ACST
Both CAT and ACST sit inside the 9 AM – 5 PM working day between 9:00 AM–9:30 AM CAT, which is 4:30 PM–5:00 PM ACST. That gives roughly 0 hours and 30 minutes of shared time — the safest window for a live call or meeting.
Business hours overlap
CAT and ACST overlap for only 30 minutes (9:00 AM–9:30 AM CAT), so meetings have to be booked precisely.
CAT is 7 hours 30 minutes ahead of ACST (CAT UTC+02:00 → ACST UTC+09:30). The shared working window is 9:00 AM–9:30 AM CAT. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
CAT
Does not observe DST
ACST
❄ Currently in Standard Time
Standard: UTC+09:30 · DST: UTC+10:30
Clocks spring forward on Sat, Oct 3, 2026
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 CAT and ACST?
CAT (CAT, UTC+02:00) is 7 hours 30 minutes ahead of ACST (ACST, UTC+09:30). The gap is currently +7h 30m.
How do I convert CAT time to ACST time?
Add +7h 30m to CAT local time. For example, 9:00 AM in CAT is 4:30 PM in ACST.
What time is it in ACST right now?
ACST uses ACST at UTC+09:30. Use the live converter at the top of this page — it updates in real time and already accounts for the +7h 30m offset from CAT.
What is the best time to call ACST from CAT?
Call between 9:00 AM and 9:30 AM CAT — that maps to 4:30 PM–5:00 PM ACST and keeps both parties inside the working day.
Which is ahead, CAT or ACST?
CAT is 7 hours 30 minutes ahead of ACST. When it is 12:00 PM in CAT it is 7:30 PM in ACST.
Does daylight saving time affect the CAT–ACST difference?
Neither zone observes daylight saving time, so the +7h 30m offset between CAT and ACST is fixed all year.
Which other cities share CAT's time zone?
CAT also covers Harare, Lusaka, Maputo, Lilongwe, Kigali.
Which countries use CAT, CAT's zone?
CAT is used in Zimbabwe, Zambia, Mozambique, Malawi, Rwanda, Burundi, DR Congo (east).
Is there a day difference between CAT and ACST?
Not normally. The +7h 30m gap only pushes the date over for late-evening times.
What is the time difference between CAT and ACST?
ACST is +7h 30m from CAT.
What timezone is CAT in?
CAT operates on its local timezone.
What timezone is ACST in?
ACST operates on its local timezone.
Which countries use CAT (Central Africa Time)?
CAT is used in Zimbabwe, Zambia, Mozambique, Malawi, Rwanda, Burundi, and 1 more countries.
Does CAT observe daylight saving time?
No, CAT does not observe daylight saving time and remains at UTC+02:00 year-round.
What are some interesting facts about CAT?
Central Africa Time is fixed at UTC+02:00 with no daylight saving. CAT matches South Africa Standard Time (SAST) all year.
Which cities are in the ACST timezone?
Major cities in the ACST timezone include Adelaide, Darwin, Alice Springs, Mount Gambier.
What is the UTC offset for ACST?
Australian Central Standard Time (ACST) is at UTC+09:30. During daylight saving time, it shifts to ACDT.
What should I know about the ACST timezone?
ACST uses a half-hour offset: UTC+09:30. South Australia moves to ACDT (UTC+10:30) in summer; the Northern Territory does not.
When is it midnight in CAT, what time is it in ACST?
When it is 12:00 AM (midnight) in CAT (CAT), it is +7h 30m later in ACST (ACST).
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