Convert CEST to ACDT
ACDT is 8 hours 30 minutes ahead of CEST. CEST is UTC+2 and ACDT is UTC+10:30.
Right now: CEST · ACDT
Best time to schedule a meeting
Standard 9–5 working hours do not overlap at all between CEST and ACDT. Someone has to take an early or late call — or use asynchronous communication instead.
| CEST | ACDT | Suitable? |
|---|---|---|
| 9:00 AM | 5:30 PM | outside 9–5 |
| 10:00 AM | 6:30 PM | outside 9–5 |
| 11:00 AM | 7:30 PM | outside 9–5 |
| 12:00 PM | 8:30 PM | outside 9–5 |
| 1:00 PM | 9:30 PM | outside 9–5 |
| 2:00 PM | 10:30 PM | outside 9–5 |
| 3:00 PM | 11:30 PM | outside 9–5 |
| 4:00 PM | 12:30 AM (next day) | outside 9–5 |
| 5:00 PM | 1:30 AM (next day) | outside 9–5 |
CEST to ACDT conversion table
| CEST | ACDT |
|---|---|
| 12:00 AM | 8:30 AM |
| 1:00 AM | 9:30 AM |
| 2:00 AM | 10:30 AM |
| 3:00 AM | 11:30 AM |
| 4:00 AM | 12:30 PM |
| 5:00 AM | 1:30 PM |
| 6:00 AM | 2:30 PM |
| 7:00 AM | 3:30 PM |
| 8:00 AM | 4:30 PM |
| 9:00 AM | 5:30 PM |
| 10:00 AM | 6:30 PM |
| 11:00 AM | 7:30 PM |
| 12:00 PM | 8:30 PM |
| 1:00 PM | 9:30 PM |
| 2:00 PM | 10:30 PM |
| 3:00 PM | 11:30 PM |
| 4:00 PM | 12:30 AM (next day) |
| 5:00 PM | 1:30 AM (next day) |
| 6:00 PM | 2:30 AM (next day) |
| 7:00 PM | 3:30 AM (next day) |
| 8:00 PM | 4:30 AM (next day) |
| 9:00 PM | 5:30 AM (next day) |
| 10:00 PM | 6:30 AM (next day) |
| 11:00 PM | 7:30 AM (next day) |
About CEST
Central European Summer Time (CEST) is UTC+2. It is used in Paris, Berlin, Madrid and Rome from late March to late October.
Central European Summer Time is UTC+2, in force from the last Sunday in March to the last Sunday in October. The European changeover happens at 01:00 UTC everywhere simultaneously, unlike the US which changes at 2am local time in each zone — so Europe's internal offsets never break during the transition, while North America's briefly do.
About ACDT
Australian Central Daylight Time (ACDT) is UTC+10:30. It is used in Adelaide in summer.
Australian Central Daylight Time is UTC+10:30, what South Australia keeps from October to April. Darwin stays on ACST through the summer, so for those months two cities in the same nominal zone are an hour apart — the only reason to be precise about which of the two abbreviations a meeting invitation carries.
Does this gap change with the seasons?
This gap is seasonal. The abbreviations themselves are fixed offsets, but the region on CEST switches to CET (UTC+1) from late October to late March. So the 8.5-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.
ACDT does not shift, so the whole change comes from one side. A recurring meeting fixed in ACDT 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 CEST in ACDT?
9:00 AM CEST is 5:30 PM ACDT.
Is ACDT ahead of CEST?
ACDT is 8 hours 30 minutes ahead of CEST.
Which time zone does this use?
CEST is UTC+2 and ACDT is UTC+10:30. 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.