CT to ACST Converter
ACST is not used on this date
This converter keeps ACST at GMT +9:30. Adelaide uses ACDT (GMT +10:30) on this date. Open the ACDT converter, or choose Adelaide, Adelaide Hills, or Mount Gambier for city-specific time.Quick answers
Selected conversion
The selected date and time will appear here when the converter loads.
How the time difference changes
For most of the year, CT is 14 hours and 30 minutes behind ACST. At other times of the year, CT is 15 hours and 30 minutes behind ACST.
For most of the year, working hours of 9:00 am to 5:00 pm in CT correspond to 11:30 pm to 7:30 am (next day) in ACST. At other times of the year, working hours of 9:00 am to 5:00 pm in CT correspond to 12:30 am (next day) to 8:30 am (next day) in ACST.
Compare CT time with ACST time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
Central Time is 15 hours and 30 minutes behind Australian Central Standard Time
6:00 am06:00 in CT is 9:30 pm21:30 in ACST
CT to ACST call time
Best time for a conference call or a meeting is between 5pm-6pm in CT which corresponds to 8:30am-9:30am in ACST (next day)
6:00 am06:00 Central Time (CT). Offset UTC -6:00 hours
9:30 pm21:30 Australian Central Standard Time (ACST). Offset UTC +9:30 hours
6:00 am06:00 CT / 9:30 pm21:30 ACST
| CT | ACST |
|---|---|
| 12am (midnight) | 3:30 pm |
| 1am | 4:30 pm |
| 2am | 5:30 pm |
| 3am | 6:30 pm |
| 4am | 7:30 pm |
| 5am | 8:30 pm |
| 6am | 9:30 pm |
| 7am | 10:30 pm |
| 8am | 11:30 pm |
| 9am | 12:30 am |
| 10am | 1:30 am |
| 11am | 2:30 am |
| 12pm (noon) | 3:30 am |
| 1pm | 4:30 am |
| 2pm | 5:30 am |
| 3pm | 6:30 am |
| 4pm | 7:30 am |
| 5pm | 8:30 am |
| 6pm | 9:30 am |
| 7pm | 10:30 am |
| 8pm | 11:30 am |
| 9pm | 12:30 pm |
| 10pm | 1:30 pm |
| 11pm | 2:30 pm |
| 00:00 | 15:30 |
| 01:00 | 16:30 |
| 02:00 | 17:30 |
| 03:00 | 18:30 |
| 04:00 | 19:30 |
| 05:00 | 20:30 |
| 06:00 | 21:30 |
| 07:00 | 22:30 |
| 08:00 | 23:30 |
| 09:00 | 00:30 |
| 10:00 | 01:30 |
| 11:00 | 02:30 |
| 12:00 | 03:30 |
| 13:00 | 04:30 |
| 14:00 | 05:30 |
| 15:00 | 06:30 |
| 16:00 | 07:30 |
| 17:00 | 08:30 |
| 18:00 | 09:30 |
| 19:00 | 10:30 |
| 20:00 | 11:30 |
| 21:00 | 12:30 |
| 22:00 | 13:30 |
| 23:00 | 14:30 |
Central Time
Central Time (CT) is a general term used to describe the areas that observe either the Central Standard Time (CST) or Central Daylight Time (CDT) in the United States and Canada. CT is not static but switches between CDT and CST.
Territories observing the time zone are primarily in North and Central America. It runs through several Mexican and U.S. states, as well as several Canadian provinces and Central American countries.
Countries using this time zone: Belize, Canada, Costa Rica, Guatemala, Honduras, Mexico, Nicaragua, El Salvador, United States.
Principal Cities: The largest city in the CST time zone is Mexico City in Mexico, with about 12.294 million people. Other major cities in this time zone include Chicago, Houston, Iztapalapa, Ecatepec.
French: HNC - Heure Normale du Centre
Spanish: CT - Tiempo Central Estándar, CT - Zona Centro
CT representations, usage and related time zones
- -06 - basic short
- -0600 - basic
- -06:00 - extended
- -0600 - sign character (-) followed by a four digit time providing hours (06) and minutes (00) of the offset. Indicates an offset of six hours to the west of the zero meridian.
- Sierra - Military abbreviation for CT
- S - short form of 'Sierra'
- CST - Central Standard Time
- CT - Central Time
- MDT - Mountain Daylight Time
- EAST - Easter Island Standard Time
- GALT - Galapagos Time
- S - Sierra Time Zone
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 Darwin in Australia, with about 139,902 people. Other major cities in this time zone include 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).
End: Australian Central Standard Time (ACST) ended on Sunday, October 5, 2025 at 2:00 am local time and clocks were set one hour forward to Sunday, October 5, 2025, 3:00 am local daylight time instead. Standard time ends annually on the first Sunday of October.
Start: Australian Central Standard Time (ACST) starts on Sunday, April 5, 2026 at 3:00 am local time and clocks are set one hour back to Sunday, April 5, 2026, 2:00 am. Standard time starts annually on the first Sunday of April.
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