| Current: | ACST — Australian Central Standard Time |
|---|---|
| Next Change: | ACDT — Australian Central Daylight Time |
| Current Offset: | UTC/GMT +9:30 hours |
| Difference: | 13:30 hours ahead of Columbus |
2018 Time Zones - Question Mark
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
The graph above illustrates clock changes in Question Mark during 2018.
Note that Question Mark uses a special half-hour time zone.
Time Changes in Question Mark Over the Years
Daylight Saving Time (DST) changes do not necessarily occur on the same date every year.
| Year | Date & Time | Abbreviation | Time Change | Offset After |
|---|---|---|---|---|
| 2010 | Sun, Apr 4 at 3:00 am | ACDT → ACST | -1 hour (DST end) | UTC+9:30h |
| Sun, Oct 3 at 2:00 am | ACST → ACDT | +1 hour (DST start) | UTC+10:30h | |
| 2011 | Sun, Apr 3 at 3:00 am | ACDT → ACST | -1 hour (DST end) | UTC+9:30h |
| Sun, Oct 2 at 2:00 am | ACST → ACDT | +1 hour (DST start) | UTC+10:30h | |
| 2012 | Sun, Apr 1 at 3:00 am | ACDT → ACST | -1 hour (DST end) | UTC+9:30h |
| Sun, Oct 7 at 2:00 am | ACST → ACDT | +1 hour (DST start) | UTC+10:30h | |
| 2013 | Sun, Apr 7 at 3:00 am | ACDT → ACST | -1 hour (DST end) | UTC+9:30h |
| Sun, Oct 6 at 2:00 am | ACST → ACDT | +1 hour (DST start) | UTC+10:30h | |
| 2014 | Sun, Apr 6 at 3:00 am | ACDT → ACST | -1 hour (DST end) | UTC+9:30h |
| Sun, Oct 5 at 2:00 am | ACST → ACDT | +1 hour (DST start) | UTC+10:30h | |
| 2015 | Sun, Apr 5 at 3:00 am | ACDT → ACST | -1 hour (DST end) | UTC+9:30h |
| Sun, Oct 4 at 2:00 am | ACST → ACDT | +1 hour (DST start) | UTC+10:30h | |
| 2016 | Sun, Apr 3 at 3:00 am | ACDT → ACST | -1 hour (DST end) | UTC+9:30h |
| Sun, Oct 2 at 2:00 am | ACST → ACDT | +1 hour (DST start) | UTC+10:30h | |
| 2017 | Sun, Apr 2 at 3:00 am | ACDT → ACST | -1 hour (DST end) | UTC+9:30h |
| Sun, Oct 1 at 2:00 am | ACST → ACDT | +1 hour (DST start) | UTC+10:30h | |
| 2018 | Sun, Apr 1 at 3:00 am | ACDT → ACST | -1 hour (DST end) | UTC+9:30h |
| Sun, Oct 7 at 2:00 am | ACST → ACDT | +1 hour (DST start) | UTC+10:30h | |
| 2019 | Sun, Apr 7 at 3:00 am | ACDT → ACST | -1 hour (DST end) | UTC+9:30h |
| Sun, Oct 6 at 2:00 am | ACST → ACDT | +1 hour (DST start) | UTC+10:30h | |
| * All times are local Question Mark time. | ||||
Data for the years before 1970 is not available for Question Mark, however, we have earlier time zone history for Adelaide available.
More Information
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Question Mark
Australia
5:5051pm
Tuesday, June 24, 2025