Question 1

What is the time difference between ACST and EST?

Accepted Answer

Eastern Standard Time (EST) is 15 hours and 30 minutes 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 EST?

Accepted Answer

To convert ACST to EST, subtract 15 hours and 30 minutes from the ACST time. For example, 9:00 AM ACST is 5:30 PM EST.

Question 3

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

Accepted Answer

When it's 12:00 PM (noon) in ACST, it's 8:30 PM in EST. EST is 15 hours and 30 minutes behind ACST.

Question 4

How many hours behind is EST from ACST?

Accepted Answer

EST is 15 hours and 30 minutes behind ACST. This means when it's 9:00 AM in ACST, it's 5:30 PM in EST.

Question 5

Is EST ahead or behind ACST?

Accepted Answer

EST is behind ACST by 15 hours and 30 minutes. Clocks in EST 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 EST observe daylight saving time?

Accepted Answer

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

Question 8

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

Accepted Answer

The best time for a call between ACST and EST 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 EST may temporarily change. Check our DST change calendar for exact dates.

Question 10

Do ACST and EST ever have the same time?

Accepted Answer

No, ACST and EST are always 15 hours and 30 minutes apart. Both timezones observe DST, so the difference remains consistent.

Australian Central Standard Time (ACDT)	Period	Eastern Standard Time (EST)	Period
12:00 AM	Night	8:30 AM-1d	Morning
1:00 AM	Night	9:30 AM-1d	Business
2:00 AM	Night	10:30 AM-1d	Business
3:00 AM	Night	11:30 AM-1d	Business
4:00 AM	Night	12:30 PM-1d	Business
5:00 AM	Night	1:30 PM-1d	Business
6:00 AM	Morning	2:30 PM-1d	Business
7:00 AM	Morning	3:30 PM-1d	Business
8:00 AM	Morning	4:30 PM-1d	Business
9:00 AM	Business	5:30 PM-1d	Business
10:00 AM	Business	6:30 PM-1d	Evening
11:00 AM	Business	7:30 PM-1d	Evening
12:00 PM	Business	8:30 PM-1d	Evening
1:00 PM	Business	9:30 PM-1d	Evening
2:00 PM	Business	10:30 PM-1d	Evening
3:00 PM	Business	11:30 PM-1d	Evening
4:00 PM	Business	12:30 AM	Night
5:00 PM	Business	1:30 AM	Night
6:00 PM	Evening	2:30 AM	Night
7:00 PM	Evening	3:30 AM	Night
8:00 PM	Evening	4:30 AM	Night
9:00 PM	Evening	5:30 AM	Night
10:00 PM	Evening	6:30 AM	Morning
11:00 PM	Evening	7:30 AM	Morning

ACST to EST Converter

Timezone Details

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ACST to EST Conversion Table

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