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ACDT to CDT Converter

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ACDT
Australian Central Daylight Time
GMT +10:30
12am
3am
6am
9am
12pm
3pm
6pm
9pm
CST/CDT
Central Standard Time
GMT -6
12am
3am
6am
9am
12pm
3pm
6pm
9pm
CDT is not used on this date
This converter uses CST (GMT -6), the offset Chicago uses on this date. Open the CST converter.

Quick answers

Selected conversion

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

ACDT and CDT examples

These examples always use ACDT (UTC+10:30) and CDT (UTC-5). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.

ACDT is 15 hours and 30 minutes ahead of 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 CDT 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 1.469 million people. Other major cities in this time zone include Adelaide Hills, Mount Gambier, Morphett Vale, Broken Hill.

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 Daylight Time

Offset: CDT is 5 hours behind Greenwich Mean Time (GMT) and is used in North America

Countries using this time zone: Canada, Mexico, United States

Principal Cities: The largest city in the CDT time zone is Chicago in the United States, with about 2.664 million people. Other major cities in this time zone include Houston, San Antonio, Ciudad Juarez, Dallas.

French: HAC - Heure Avancée du Centre

Spanish: CT - Zona Centro

CDT Time Zone Geo Map
CDT timezone map

Daylight Saving: Central Daylight Time (CDT) is a daylight saving/summer time zone, but some places set clocks back one hour during winter and observe Central Standard Time (CST).

Daylight saving time clock moves forward for one hour from 2am to 3amEnd: Central Daylight Time (CDT) ended 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 local standard time instead. Daylight saving ends annually on the first Sunday of November

Daylight saving time clock moves back for one hour from 2am to 1amStart: Central Daylight Time (CDT) starts 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. Daylight saving starts annually on the second Sunday of March

CDT representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • -05 - basic short
  • -0500 - basic
  • -05:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • -0500 - sign character (-) followed by a four digit time providing hours (05) and minutes (00) of the offset. Indicates an offset of five hours to the west of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Romeo - Military abbreviation for CDT
  • R - short form of 'Romeo'
IANA/Olson: Reflects CDT time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • America/Chicago
  • America/Indiana/Knox
  • America/Indiana/Tell_City
  • America/Knox_IN
  • America/Matamoros
  • America/Menominee
  • America/North_Dakota/Beulah
  • America/North_Dakota/Center
  • America/North_Dakota/New_Salem
  • America/Ojinaga
  • America/Rainy_River
  • America/Rankin_Inlet
  • America/Resolute
  • America/Winnipeg
  • CST6CDT
  • Canada/Central
  • US/Central
  • US/Indiana-Starke
CDT Abbreviation: Several time zones share CDT abbreviation and it could refer to these time zones
  • Central Daylight Time - UTC -5
  • Cuba Daylight Time - UTC -4
Time zones with the GMT -5 offset:
  • CDT - Central Daylight Time
  • EST - Eastern Standard Time
  • ET - Eastern Time
  • COT - Colombia Time
  • CST - Cuba Standard Time
  • EASST - Easter Island Summer Time
  • ECT - Ecuador Time
  • PET - Peru Time
  • R - Romeo Time Zone
EST to ISTGMT to ESTPST to ESTEST to GMTPST to GMT