Convert ACST to IST
Convert a time in ACST to IST, with daylight-saving changes applied for the date you choose.
ACST to IST
Time in ACST, Oceania
Time in IST, Asia
- ACST now
- —
- IST now
- —
Time zone details
ACST, Oceania
- IANA zone
- Australia/Darwin
- Standard offset
- UTC+09:30
- Daylight saving
- Not observed
IST, Asia
- IANA zone
- Asia/Kolkata
- Standard offset
- UTC+05:30
- Daylight saving
- Not observed
Sunrise and sunset are calculated for the city centre and are accurate to about a minute. Local elevation and atmospheric conditions shift the observed horizon.
Need the reverse direction? Convert IST to ACST.
Related time zones conversions
Frequently asked questions
What is the time difference between ACST and IST?+
ACST is UTC+09:30 and IST is UTC+05:30 in standard time. The gap between them changes during the year if either place observes daylight saving, so enter a date to see the difference on that day.
Does ACST observe daylight saving time?+
No. ACST stays on UTC+09:30 all year.
Does IST observe daylight saving time?+
No. IST stays on UTC+05:30 all year.
Why does one local time sometimes have two answers?+
When clocks go back, the hour before the change repeats, so that local reading happens twice and both instants are valid. When clocks go forward, the skipped hour never occurs, so that reading has no matching instant at all. The converter reports both cases rather than guessing.