Time in ACST and IDLW
The time difference between Australian Central Standard Time (ACST) and International Date Line West Time (IDLW) is 21 hours 30 minutes. International Date Line West Time is 21 hours 30 minutes behind Australian Central Standard Time.
This means 9am ACST is 11:30am IDLW (previous day) and 5pm ACST is 7:30pm IDLW (previous day).
Australian Central Standard Time
- The current local time in ACST is 9:58 pm (July 18, 2026)
- ACST time zone offset is UTC+09:30
International Date Line West Time
- The current local time in IDLW is 12:28 am (July 19, 2026)
- IDLW time zone offset is UTC-12:00
How to convert Australian Central Standard Time to International Date Line West Time?
Subtract 21 hours 30 minutes from Australian Central Standard Time to get International Date Line West Time.
Time in ACST
00:00
Time in IDLW
00:00
Use the slider above to convert Australian Central Standard Time to International Date Line West Time and view the day and night map at different times.
Day–night colors on the map:
Day
Civil twilight
Nautical twilight
Astronomical twilight
NightTime Conversion Chart
| ACST | IDLW |
|---|---|
| 12am | 2:30am |
| 1am | 3:30am |
| 2am | 4:30am |
| 3am | 5:30am |
| 4am | 6:30am |
| 5am | 7:30am |
| 6am | 8:30am |
| 7am | 9:30am |
| 8am | 10:30am |
| 9am | 11:30am |
| 10am | 12:30pm |
| 11am | 1:30pm |
| 12pm | 2:30pm |
| 1pm | 3:30pm |
| 2pm | 4:30pm |
| 3pm | 5:30pm |
| 4pm | 6:30pm |
| 5pm | 7:30pm |
| 6pm | 8:30pm |
| 7pm | 9:30pm |
| 8pm | 10:30pm |
| 9pm | 11:30pm |
| 10pm | 0:30am |
| 11pm | 1:30am |