LHST to ACST Converter
Quick answers
Selected conversion
The selected date and time will appear here when the converter loads.
LHST and ACST examples
These examples always use LHST (UTC+10:30) and ACST (UTC+9:30). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.
LHST is 1 hour ahead of ACST.
How the time difference changes
Depending on seasonal clock changes, LHST is 1 hour ahead of ACST or LHDT is 1 hour and 30 minutes ahead of ACST.
Depending on seasonal clock changes, working hours of 9:00 am to 5:00 pm in LHST correspond to 8:00 am to 4:00 pm in ACST or working hours of 9:00 am to 5:00 pm in LHDT correspond to 7:30 am to 3:30 pm in ACST.
Compare LHST time with ACST time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
Lord Howe Standard Time is 1 hour ahead of Australian Central Standard Time
6:30 am06:30 in LHST is 5:30 am05:30 in ACST
LHST to ACST call time
Best time for a conference call or a meeting is between 10am-5pm in LHST which corresponds to 9am-4pm in ACST
6:30 am06:30 Lord Howe Standard Time (LHST). Offset UTC +10:30 hours
5:30 am05:30 Australian Central Standard Time (ACST). Offset UTC +9:30 hours
6:30 am06:30 LHST / 5:30 am05:30 ACST
| LHST | ACST |
|---|---|
| 12am (midnight) | 11pm |
| 1am | 12am (midnight) |
| 2am | 1am |
| 3am | 2am |
| 4am | 3am |
| 5am | 4am |
| 6am | 5am |
| 7am | 6am |
| 8am | 7am |
| 9am | 8am |
| 10am | 9am |
| 11am | 10am |
| 12pm (noon) | 11am |
| 1pm | 12pm (noon) |
| 2pm | 1pm |
| 3pm | 2pm |
| 4pm | 3pm |
| 5pm | 4pm |
| 6pm | 5pm |
| 7pm | 6pm |
| 8pm | 7pm |
| 9pm | 8pm |
| 10pm | 9pm |
| 11pm | 10pm |
| 00:00 | 23:00 |
| 01:00 | 00:00 |
| 02:00 | 01:00 |
| 03:00 | 02:00 |
| 04:00 | 03:00 |
| 05:00 | 04:00 |
| 06:00 | 05:00 |
| 07:00 | 06:00 |
| 08:00 | 07:00 |
| 09:00 | 08:00 |
| 10:00 | 09:00 |
| 11:00 | 10:00 |
| 12:00 | 11:00 |
| 13:00 | 12:00 |
| 14:00 | 13:00 |
| 15:00 | 14:00 |
| 16:00 | 15:00 |
| 17:00 | 16:00 |
| 18:00 | 17:00 |
| 19:00 | 18:00 |
| 20:00 | 19:00 |
| 21:00 | 20:00 |
| 22:00 | 21:00 |
| 23:00 | 22:00 |
Lord Howe Standard Time
Offset: LHST is 10 hours and 30 minutes ahead Greenwich Mean Time (GMT) and is used in Australia
Countries using this time zone: Australia
Daylight Saving: This is a standard time zone. During summer, some places set clocks forward one hour for daylight saving time and observe Lord Howe Daylight Time (LHDT).
Start: Lord Howe Standard Time (LHST) started on Sunday, April 5, 2026 at 2:00 am local time and clocks were set one hour back to Sunday, April 5, 2026, 1:30 am. Standard time starts annually on the first Sunday of April.
End: Lord Howe Standard Time (LHST) ends on Sunday, October 4, 2026 at 2:00 am local time and clocks are set one hour forward to Sunday, October 4, 2026, 2:30 am local daylight time instead. Standard time ends annually on the first Sunday of October.
LHST representations, usage and related time zones
- +1030 - basic
- +10:30 - extended
- +1030 - sign character (+) followed by a four digit time providing hours (10) and minutes (30) of the offset. Indicates an offset of ten hours and thirty minutes to the east of the zero meridian.
- ACDT - Australian Central Daylight Time
- LHST - Lord Howe Standard Time
Australian Central Standard Time
Offset: ACST is 9 hours and 30 minutes ahead Greenwich Mean Time (GMT) and is used in Australia
Countries using this time zone: Australia
Principal Cities: The largest city in the ACST time zone is Adelaide in Australia, with about 1.469 million people. Other major cities in this time zone include Darwin, Adelaide Hills, Palmerston, Alice Springs.
Daylight Saving: This is a standard time zone. During summer, some places set clocks forward one hour for daylight saving time and observe Australian Central Daylight Time (ACDT).
Start: Australian Central Standard Time (ACST) started on Sunday, April 5, 2026 at 3:00 am local time and clocks were set one hour back to Sunday, April 5, 2026, 2:00 am. Standard time starts annually on the first Sunday of April.
End: Australian Central Standard Time (ACST) ends on Sunday, October 4, 2026 at 2:00 am local time and clocks are set one hour forward to Sunday, October 4, 2026, 3:00 am local daylight time instead. Standard time ends annually on the first Sunday of October.
ACST representations, usage and related time zones
- +0930 - basic
- +09:30 - extended
- +0930 - sign character (+) followed by a four digit time providing hours (09) and minutes (30) of the offset. Indicates an offset of nine hours and thirty minutes to the east of the zero meridian.
- Australia/Adelaide
- Australia/Broken_Hill
- Australia/Darwin
- Australia/North
- Australia/South
- Australia/Yancowinna