IST to ACST Converter
India to Adelaide — tech outsourcing and engineering services.
Time Zone Converter
Compare Times
| IST | ACST |
|---|
Morning
| IST | ACST |
|---|---|
| 12:00 AM IST | 4:00 AM ACST |
| 1:00 AM IST | 5:00 AM ACST |
| 2:00 AM IST | 6:00 AM ACST |
| 3:00 AM IST | 7:00 AM ACST |
| 4:00 AM IST | 8:00 AM ACST |
| 5:00 AM IST | 9:00 AM ACST |
| 6:00 AM IST | 10:00 AM ACST |
| 7:00 AM IST | 11:00 AM ACST |
| 8:00 AM IST | 12:00 PM ACST |
| 9:00 AM IST | 1:00 PM ACST |
| 10:00 AM IST | 2:00 PM ACST |
| 11:00 AM IST | 3:00 PM ACST |
Afternoon
| IST | ACST |
|---|---|
| 12:00 PM IST | 4:00 PM ACST |
| 1:00 PM IST | 5:00 PM ACST |
| 2:00 PM IST | 6:00 PM ACST |
| 3:00 PM IST | 7:00 PM ACST |
| 4:00 PM IST | 8:00 PM ACST |
Evening
| IST | ACST |
|---|---|
| 5:00 PM IST | 9:00 PM ACST |
| 6:00 PM IST | 10:00 PM ACST |
| 7:00 PM IST | 11:00 PM ACST |
| 8:00 PM IST | 12:00 AM ACST |
| 9:00 PM IST | 1:00 AM ACST |
| 10:00 PM IST | 2:00 AM ACST |
| 11:00 PM IST | 3:00 AM ACST |
Common Time Conversions
EST · New York →
CST · Chicago →
MST · Denver →
PST · Los Angeles →
AKST · Anchorage →
HST · Honolulu →
UTC · Universal →
GMT · London →
IST · New Delhi →
CET · Paris →
How Time Zone Conversion Works
Time zone conversion works by comparing the UTC offset of one location to another. Every city or region is measured relative to Coordinated Universal Time (UTC), which acts as the global reference point for civil time.
ACST is 4 hours ahead of IST (standard time).
Daylight Saving Time: ACST observes DST; IST does not. The offset between them shifts by 1 hour twice a year — in spring and autumn — when ACST changes its clocks.
Best Meeting Times: IST & ACST
IST
09:00–13:00
India Time
ACST
13:00–17:00
Central Australia Time
Recommended time: 11:00 IST / 15:00 ACST
DST schedule for 2026
Current-year daylight saving start and end dates for the selected zones.
IST · India Time
Standard offset +05:30
India Time remains on a constant standard offset for the year.
India does not observe daylight saving time. The IST offset of UTC+5:30 is constant year-round. Note: 'IST' is sometimes ambiguous — it can also refer to Irish Standard Time (Ireland's summer time). On TimeAtlas, IST refers exclusively to India Standard Time.
ACST · Central Australia Time
Standard offset +09:30
- Starts
- Oct 4, 2026 · 02:00 → 03:00
- first_sunday_of_october
- Ends
- Apr 5, 2026 · 03:00 → 02:00
- first_sunday_of_april
- Daylight time
- ACDT · +10:30
South Australia observes DST (ACDT, UTC+10:30); the Northern Territory remains on ACST year-round. SA has used the same Sunday transition dates as the eastern states since the 2008/09 DST season — older sources stating SA changes one week later are out of date.
Principal Cities
IST — India Time
- MumbaiIndia
- DelhiIndia
- BangaloreIndia
- HyderabadIndia
ACST — Central Australia Time
- AdelaideAustralia
- DarwinAustralia
- Alice SpringsAustralia
- PalmerstonAustralia