|

ACDT to CST Converter

Updating current time…
ACDT
Australian Central Daylight Time
GMT +10:30
12am
3am
6am
9am
12pm
3pm
6pm
9pm
CST
Central Standard Time
GMT -6
12am
3am
6am
9am
12pm
3pm
6pm
9pm

Quick answers

Selected conversion

The selected date and time will appear here when the converter loads.

ACDT and CST examples

These examples always use ACDT (UTC+10:30) and CST (UTC-6). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.

ACDT is 16 hours and 30 minutes ahead of CST.

CST uses UTC-6 during standard time. For Central Time that follows daylight saving time, use ACDT to CT. For daylight-time examples, use ACDT to CDT.

How the time difference changes

Depending on seasonal clock changes, ACST is 14 hours and 30 minutes ahead of CDT, ACDT is 15 hours and 30 minutes ahead of CDT, or ACDT is 16 hours and 30 minutes ahead of CST.

Depending on seasonal clock changes, working hours of 9:00 am to 5:00 pm in ACST correspond to 6:30 pm (previous day) to 2:30 am in CDT, working hours of 9:00 am to 5:00 pm in ACDT correspond to 5:30 pm (previous day) to 1:30 am in CDT, or working hours of 9:00 am to 5:00 pm in ACDT correspond to 4:30 pm (previous day) to 12:30 am in CST.

Compare ACDT time with CST time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.

Time Difference

Australian Central Daylight Time is 16 hours and 30 minutes ahead of Central Standard Time
10:30 pm22:30 in ACDT is 6:00 am06:00 in CST

ACDT to CST call time
Best time for a conference call or a meeting is between 9am-9:30am in ACDT which corresponds to 4:30pm-5pm in CST (previous day)

10:30 pm22:30 Australian Central Daylight Time (ACDT). Offset UTC +10:30 hours
6:00 am06:00 Central Standard Time (CST). Offset UTC -6:00 hours

10:30 pm22:30 ACDT / 6:00 am06:00 CST

ACDTCST
12am (midnight)7:30 am
1am8:30 am
2am9:30 am
3am10:30 am
4am11:30 am
5am12:30 pm
6am1:30 pm
7am2:30 pm
8am3:30 pm
9am4:30 pm
10am5:30 pm
11am6:30 pm
12pm (noon)7:30 pm
1pm8:30 pm
2pm9:30 pm
3pm10:30 pm
4pm11:30 pm
5pm12:30 am
6pm1:30 am
7pm2:30 am
8pm3:30 am
9pm4:30 am
10pm5:30 am
11pm6:30 am
00:0007:30
01:0008:30
02:0009:30
03:0010:30
04:0011:30
05:0012:30
06:0013:30
07:0014:30
08:0015:30
09:0016:30
10:0017:30
11:0018:30
12:0019:30
13:0020:30
14:0021:30
15:0022:30
16:0023:30
17:0000:30
18:0001:30
19:0002:30
20:0003:30
21:0004:30
22:0005:30
23:0006:30

Australian Central Daylight Time

Offset: ACDT is 10 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 ACDT time zone is Adelaide in Australia, with about 1.225 million people. Other major cities in this time zone include Adelaide Hills, Mount Gambier, Morphett Vale, Prospect.

ACDT Time Zone Geo Map
ACDT timezone map

Daylight Saving: Australian Central Daylight Time (ACDT) is a daylight saving/summer time zone. During winter, some places set clocks back one hour and observe Australian Central Standard Time (ACST).

Daylight saving time clock moves forward for one hour from 2am to 3amStart: Australian Central Daylight Time (ACDT) started 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. Daylight saving starts annually on the first Sunday of October

Daylight saving time clock moves back for one hour from 3am to 2amEnd: Australian Central Daylight Time (ACDT) ends 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 local standard time instead. Daylight saving ends annually on the first Sunday of April

ACDT representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +1030 - basic
  • +10:30 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +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.
IANA/Olson: Reflects ACDT time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Australia/Adelaide
  • Australia/Broken_Hill
  • Australia/South
  • Australia/Yancowinna
Time zones with the GMT +10:30 offset:
  • ACDT - Australian Central Daylight Time
  • LHST - Lord Howe Standard Time

Central Standard Time

Offset: CST is 6 hours behind Greenwich Mean Time (GMT) and is used in North America

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

CST Time Zone Geo Map
CST timezone map

Daylight Saving: This is a standard time zone. During summer, some places set clocks forward one hour for daylight saving time and observe Central Daylight Time (CDT).

Daylight saving time clock moves back for one hour from 2am to 1amStart: Central Standard Time (CST) started on Sunday, November 2, 2025 at 2:00 am local time and clocks were set one hour back to Sunday, November 2, 2025, 1:00 am. Standard time starts annually on the first Sunday of November.

Daylight saving time clock moves forward for one hour from 2am to 3amEnd: Central Standard Time (CST) ends on Sunday, March 8, 2026 at 2:00 am local time and clocks are set one hour forward to Sunday, March 8, 2026, 3:00 am local daylight time instead. Standard time ends annually on the second Sunday of March.

CST representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • -06 - basic short
  • -0600 - basic
  • -06:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • -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.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Sierra - Military abbreviation for CST
  • S - short form of 'Sierra'
IANA/Olson: Reflects CST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • America/Bahia_Banderas
  • America/Belize
  • America/Chicago
  • America/Chihuahua
  • America/Costa_Rica
  • America/El_Salvador
  • America/Guatemala
  • America/Indiana/Knox
  • America/Indiana/Tell_City
  • America/Knox_IN
  • America/Managua
  • America/Matamoros
  • America/Menominee
  • America/Merida
  • America/Mexico_City
  • America/Monterrey
  • America/North_Dakota/Beulah
  • America/North_Dakota/Center
  • America/North_Dakota/New_Salem
  • America/Ojinaga
  • America/Rainy_River
  • America/Rankin_Inlet
  • America/Regina
  • America/Resolute
  • America/Swift_Current
  • America/Tegucigalpa
  • America/Winnipeg
  • CST6CDT
  • Canada/Central
  • Canada/Saskatchewan
  • Mexico/General
  • US/Central
  • US/Indiana-Starke
CST Abbreviation: Several time zones share CST abbreviation and it could refer to these time zones
  • Central Standard Time - UTC -6
  • China Standard Time - UTC +8
  • Cuba Standard Time - UTC -5
Time zones with the GMT -6 offset:
  • CST - Central Standard Time
  • CT - Central Time
  • MDT - Mountain Daylight Time
  • EAST - Easter Island Standard Time
  • GALT - Galapagos Time
  • S - Sierra Time Zone
EST to ISTGMT to ESTPST to ESTEST to GMTPST to GMT