Question 1

What is the time difference between ACST and IST?

Accepted Answer

India Standard Time (IST) is 5 hours behind Australian Central Standard Time (ACST). Use the conversion table above to see the exact time for each hour.

Question 2

How do I convert ACST to IST?

Accepted Answer

To convert ACST to IST, subtract 5 hours from the ACST time. For example, 9:00 AM ACST is 4:00 AM IST.

Question 3

What time is it in IST when it's noon in ACST?

Accepted Answer

When it's 12:00 PM (noon) in ACST, it's 7:00 AM in IST. IST is 5 hours behind ACST.

Question 4

How many hours behind is IST from ACST?

Accepted Answer

IST is 5 hours behind ACST. This means when it's 9:00 AM in ACST, it's 4:00 AM in IST.

Question 5

Is IST ahead or behind ACST?

Accepted Answer

IST is behind ACST by 5 hours. Clocks in IST show an earlier time than ACST.

Question 6

Does ACST observe daylight saving time?

Accepted Answer

Yes, Australian Central Standard Time observes daylight saving time. During DST, the abbreviation changes to ACDT and clocks move forward by one hour.

Question 7

Does IST observe daylight saving time?

Accepted Answer

No, India Standard Time does not observe daylight saving time. The UTC offset remains the same year-round.

Question 8

What is the best time to call from ACST to IST?

Accepted Answer

The best time for a call between ACST and IST is during overlapping business hours (9 AM – 5 PM) in both timezones. Check the color-coded conversion table above — green hours indicate business hours in both zones.

Question 9

When does daylight saving time change in ACST?

Accepted Answer

Daylight saving time transitions vary by year and region. Australian Central Standard Time observes DST, which typically shifts clocks forward by one hour in spring and back in fall. During DST transitions, the time difference between ACST and IST may temporarily change. Check our DST change calendar for exact dates.

Question 10

Do ACST and IST ever have the same time?

Accepted Answer

No, ACST and IST never show the same time. However, because ACST observes daylight saving time and IST does not, the time difference between them changes by one hour during DST transitions.

Australian Central Standard Time (ACDT)	Period	India Standard Time (IST)	Period
12:00 AM	Night	7:00 PM-1d	Evening
1:00 AM	Night	8:00 PM-1d	Evening
2:00 AM	Night	9:00 PM-1d	Evening
3:00 AM	Night	10:00 PM-1d	Evening
4:00 AM	Night	11:00 PM-1d	Evening
5:00 AM	Night	12:00 AM	Night
6:00 AM	Morning	1:00 AM	Night
7:00 AM	Morning	2:00 AM	Night
8:00 AM	Morning	3:00 AM	Night
9:00 AM	Business	4:00 AM	Night
10:00 AM	Business	5:00 AM	Night
11:00 AM	Business	6:00 AM	Morning
12:00 PM	Business	7:00 AM	Morning
1:00 PM	Business	8:00 AM	Morning
2:00 PM	Business	9:00 AM	Business
3:00 PM	Business	10:00 AM	Business
4:00 PM	Business	11:00 AM	Business
5:00 PM	Business	12:00 PM	Business
6:00 PM	Evening	1:00 PM	Business
7:00 PM	Evening	2:00 PM	Business
8:00 PM	Evening	3:00 PM	Business
9:00 PM	Evening	4:00 PM	Business
10:00 PM	Evening	5:00 PM	Business
11:00 PM	Evening	6:00 PM	Evening

ACST to IST Converter

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