The short answer

10am in Australian Central Standard Time is 8:30pm in Eastern Daylight Time on the previous day.

Australian Central Standard Time is 13 hours 30 minutes ahead of Eastern Daylight Time. That's already evening in Eastern Daylight Time, after the typical working day ends.

Australian Central Standard Time☀
10am
Eastern Daylight Time☾
8:30pm
previous day
Right now
7:21pmACST · UTC+09:30 · Sun, Aug 30
5:51amEDT · UTC-04:00 · Sun, Aug 30
Read across to convert
Australian Central Standard Time
ACST · UTC+09:30
7:21pm ☾
Eastern Daylight Time
EDT · UTC-04:00
5:51am ☾
Pinned10amAustralian Central Standard Time=8:30pmEastern Daylight Time · Sat (previous day)
12amSun
10:30amSat ·−1d
WORK
1am
11:30amSat ·−1d
WORK
2am
12:30pmSat ·−1d
WORK
3am
1:30pmSat ·−1d
WORK
4am
2:30pmSat ·−1d
WORK
5am
3:30pmSat ·−1d
WORK
6am
4:30pmSat ·−1d
WORK
7am
5:30pmSat ·−1d
8am
6:30pmSat ·−1d
9am
WORK
7:30pmSat ·−1d
PINNED
10am
WORK
8:30pmSat ·−1d
11am
WORK
9:30pmSat ·−1d
12pm
WORK
10:30pmSat ·−1d
1pm
WORK
11:30pmSat ·−1d
2pm
WORK
12:30amSun
3pm
WORK
1:30am
4pm
WORK
2:30am
5pm
3:30am
6pm
4:30am
NOW
7pm
5:30am
8pm
6:30am
9pm
7:30am
10pm
8:30am
11pm
9:30am
WORK
daylightnightworking hoursoverlap
Convert a specific time12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
Best time to meet
Closest workable window
Just outside the working window — early on one side, late on the other.
Australian Central Standard Time
7am–9am
=
Eastern Daylight Time
5:30pm–7:30pm
previous day
Popular conversions

Quick reference.

9amAustralian Central Standard Time=7:30pmEastern Daylight Time · prev day
12pmAustralian Central Standard Time=10:30pmEastern Daylight Time · prev day
3pmAustralian Central Standard Time=1:30amEastern Daylight Time
5pmAustralian Central Standard Time=3:30amEastern Daylight Time
9pmAustralian Central Standard Time=7:30amEastern Daylight Time
In context

What each side covers.

7:21pm
Cities on this clock
Adelaide
Eastern Daylight Time
EDT · UTC-04:00
5:51am
Cities on this clock
Washington, D.C.New YorkBrooklynQueens
Did you mean…? “EDT” is shared by several places. This page shows Eastern Daylight Time (US & Canada) — or switch to Australian Eastern Standard Time.

Frequently asked

Quick answers about converting between Australian Central Standard Time and Eastern Daylight Time. Can't find what you need? Email [email protected].

What is the time difference between Australian Central Standard Time and Eastern Daylight Time?
Australian Central Standard Time is 13 hours 30 minutes ahead of Eastern Daylight Time right now. We always show the live, daylight-saving-correct difference, so this figure already accounts for whichever side is observing summer time today.
When it's 10am in Australian Central Standard Time, what time is it in Eastern Daylight Time?
10am in Australian Central Standard Time is 8:30pm in Eastern Daylight Time on the previous day. That's already evening in Eastern Daylight Time, after the typical working day ends. Use the hour-by-hour table above to read any other time across.
What's the best time for a call between Australian Central Standard Time and Eastern Daylight Time?
There's no comfortable 9-to-5 overlap between Australian Central Standard Time and Eastern Daylight Time — they sit on opposite sides of the planet's working day. Plan for an early or late call on one side, or hand work off asynchronously.
Does this account for daylight saving time?
Yes. We track every clock change in both places, so the abbreviations you see — ACST and EDT — are the ones actually in effect right now, not a fixed all-year value. When either side changes its clocks, this page updates automatically.
Why is the date sometimes different on each side?
When two places are far enough apart, the same moment can fall on different calendar days. That is why some conversions are marked "previous day" or "next day" — it is the same instant in time, read off two clocks that crossed midnight at different points.