World Timezones

ACST to WIB Converter

Compare WIB to ACST instead
Australian Central Time2:06 pmFri, Jun 5
Australian Central TimeACST
Oceania · UTC+9:30
2:06 pmFri, Jun 5
12a
1a
2a
3a
4a
5a
6a
7a
8a
9a
10a
11a
12p
1p
2p
3p
4p
5p
6p
7p
8p
9p
10p
11p
Western Indonesia TimeWIB
Asia · UTC+7
11:36 amFri, Jun 5
9p
10p
11p
12a
1a
2a
3a
4a
5a
6a
7a
8a
9a
10a
11a
12p
1p
2p
3p
4p
5p
6p
7p
8p

Offset

The time difference between Australian Central Time and Western Indonesia Time is 2.5 hours.

2.5 hours

Australian Central Time (ACST) is ahead of Western Indonesia Time (WIB).

ACST: UTC+9:30

WIB: UTC+7

Neither Australian Central Time nor Western Indonesia Time is currently observing daylight saving time.

When to schedule

Business-hours overlap: 12 PM–5 PM in Australian Central Time (9 AM–2 PM in Western Indonesia Time).

Both teams are in working hours during this window on weekdays.

Suggested time: 2:00 PM Australian Central Time (11:30 AM Western Indonesia Time).

This window may shift by an hour during daylight saving time.

Public holidays in 2026

National public holidays can affect availability — a counterpart is likely off work on their own holidays, so it's worth planning meetings and deadlines around them.

Australia

  • New Year's DayThu, Jan 1
  • Australia DayMon, Jan 26
  • Good FridayFri, Apr 3
  • Easter MondayMon, Apr 6
  • Christmas DayFri, Dec 25
  • St. Stephen's DayMon, Dec 28

Indonesia

  • New Year's DayThu, Jan 1
  • Good FridayFri, Apr 3
  • Easter SundaySun, Apr 5
  • Labour DayFri, May 1
  • Ascension DayThu, May 14
  • Pancasila DayMon, Jun 1
  • Independence DayMon, Aug 17
  • Christmas DayFri, Dec 25

About these zones

Australian Central Time is also known as ACST, or ACDT. To call Australia, dial +61.

Western Indonesia Time is also known as WIB. To call Indonesia, dial +62.

Western Indonesia Time is approximately 2,850 miles northwest of Australian Central Time.

Quick reference

Full 24-hour conversion table — tap any time to open it in the converter.

ACSTWIBDay
12:00 am9:30 pm-1 day
1:00 am10:30 pm-1 day
2:00 am11:30 pm-1 day
3:00 am12:30 amSame day
4:00 am1:30 amSame day
5:00 am2:30 amSame day
6:00 am3:30 amSame day
7:00 am4:30 amSame day
8:00 am5:30 amSame day
9:00 am6:30 amSame day
10:00 am7:30 amSame day
11:00 am8:30 amSame day
12:00 pm9:30 amSame day
1:00 pm10:30 amSame day
2:00 pm11:30 amSame day
3:00 pm12:30 pmSame day
4:00 pm1:30 pmSame day
5:00 pm2:30 pmSame day
6:00 pm3:30 pmSame day
7:00 pm4:30 pmSame day
8:00 pm5:30 pmSame day
9:00 pm6:30 pmSame day
10:00 pm7:30 pmSame day
11:00 pm8:30 pmSame day

Daylight saving time

Australian Central Time observes daylight saving time; Western Indonesia Time does not. The offset between the two zones changes when Australian Central Time transitions: on Sunday, October 4, 2026, clocks spring forward from ACST to ACDT.

See the daylight saving time page for transition dates across every time zone.

Daylight today

Australian Central Time
Sunrise
7:18 AM
Sunset
5:12 PM
Day length
9h 55m
Western Indonesia Time
Sunrise
5:59 AM
Sunset
5:45 PM
Day length
11h 47m

Daylight overlap: 8h 44m — 8:29 AM–5:12 PM in Australian Central Time (5:59 AM–2:42 PM in Western Indonesia Time). Both locations are in daylight during this window.

Cities in these zones

Cities in Australian Central Time

Browse all cities to see the current local time anywhere.

Airports in these zones

Airports in Australian Central Time

  • ADL

Airports in Western Indonesia Time

  • CGK
  • HLP
  • SUB
  • BDO
  • KNO
  • PLM
  • SRG

Related conversions

Common conversions

What is 9:00 am ACST in WIB?
9:00 am ACST is 6:30 am WIB.
What is 12:00 pm ACST in WIB?
12:00 pm ACST is 9:30 am WIB.
What is 12:30 pm ACST in WIB?
12:30 pm ACST is 10:00 am WIB.
What is 2:00 pm ACST in WIB?
2:00 pm ACST is 11:30 am WIB.
What is 5:00 pm ACST in WIB?
5:00 pm ACST is 2:30 pm WIB.
What is 11:30 pm ACST in WIB?
11:30 pm ACST is 9:00 pm WIB.