Convert ACST to EEST
EEST is 6 hours 30 minutes behind ACST. ACST is UTC+9:30 and EEST is UTC+3.
Right now: ACST · EEST
Best time to schedule a meeting
Standard 9–5 working hours overlap for 1 hour: 4:00 PM–5:00 PM ACST (9:00 AM–10:00 AM EEST). Schedule meetings inside that window.
| ACST | EEST | Suitable? |
|---|---|---|
| 9:00 AM | 2:30 AM | outside 9–5 |
| 10:00 AM | 3:30 AM | outside 9–5 |
| 11:00 AM | 4:30 AM | outside 9–5 |
| 12:00 PM | 5:30 AM | outside 9–5 |
| 1:00 PM | 6:30 AM | outside 9–5 |
| 2:00 PM | 7:30 AM | outside 9–5 |
| 3:00 PM | 8:30 AM | outside 9–5 |
| 4:00 PM | 9:30 AM | working hours |
| 5:00 PM | 10:30 AM | working hours |
ACST to EEST conversion table
| ACST | EEST |
|---|---|
| 12:00 AM | 5:30 PM (previous day) |
| 1:00 AM | 6:30 PM (previous day) |
| 2:00 AM | 7:30 PM (previous day) |
| 3:00 AM | 8:30 PM (previous day) |
| 4:00 AM | 9:30 PM (previous day) |
| 5:00 AM | 10:30 PM (previous day) |
| 6:00 AM | 11:30 PM (previous day) |
| 7:00 AM | 12:30 AM |
| 8:00 AM | 1:30 AM |
| 9:00 AM | 2:30 AM |
| 10:00 AM | 3:30 AM |
| 11:00 AM | 4:30 AM |
| 12:00 PM | 5:30 AM |
| 1:00 PM | 6:30 AM |
| 2:00 PM | 7:30 AM |
| 3:00 PM | 8:30 AM |
| 4:00 PM | 9:30 AM |
| 5:00 PM | 10:30 AM |
| 6:00 PM | 11:30 AM |
| 7:00 PM | 12:30 PM |
| 8:00 PM | 1:30 PM |
| 9:00 PM | 2:30 PM |
| 10:00 PM | 3:30 PM |
| 11:00 PM | 4:30 PM |
About ACST
Australian Central Standard Time (ACST) is UTC+9:30. It is used in Adelaide and Darwin in winter.
Australian Central Standard Time is UTC+9:30, half an hour behind the eastern states rather than a whole hour, which surprises people every time. South Australia moves to daylight saving in October and the Northern Territory does not, so Adelaide and Darwin share this offset for half the year and are an hour apart for the other half.
About EEST
Eastern European Summer Time (EEST) is UTC+3. It is used in Athens, Helsinki and Kyiv in summer.
Eastern European Summer Time is UTC+3, the summer clock for Greece, Finland, Romania, Bulgaria and the Baltics. In summer it coincides with Moscow Time, which does not move — so Helsinki and Moscow agree for half the year and differ by an hour for the other half, without Moscow having changed anything.
Does this gap change with the seasons?
This gap is seasonal. The abbreviations themselves are fixed offsets, but the region on EEST switches to EET (UTC+2) from late October to late March. So the 6.5-hour figure on this page is correct for the part of the year when both places are actually on these abbreviations, and changes by an hour outside it.
ACST does not shift, so the whole change comes from one side. A recurring meeting fixed in ACST will appear to move by an hour for everyone on the other side, twice a year, without anyone changing anything.
This is the reason scheduling systems store an IANA zone such as Region/City rather than an offset or an abbreviation: the zone knows its own rules and the offset does not.
Frequently asked questions
What time is 9:00 AM ACST in EEST?
9:00 AM ACST is 2:30 AM EEST.
Is EEST ahead of ACST?
EEST is 6 hours 30 minutes behind ACST.
Which time zone does this use?
ACST is UTC+9:30 and EEST is UTC+3. Both abbreviations denote a single fixed offset, so this conversion never shifts with daylight saving — what changes is which abbreviation a place is using at the time.