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ACDT
12am
3am
6am
9am
12pm
3pm
6pm
9pm
CT/CDT
UTC−5
15h 30m behind
12am
3am
6am
9am
12pm
3pm
6pm
9pm

Quick answers

Selected conversion

10:30 pm22:30 ACDT (UTC+10:30), Oct 23, 2026 = 7:00 am07:00 CDT (UTC-5), Oct 23, 2026

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 CT, ACDT is 15 hours and 30 minutes ahead of CT, or ACDT is 16 hours and 30 minutes ahead of CT.

Depending on seasonal clock changes, working hours of 9:00 am to 6:00 pm in ACST correspond to 6:30 pm (previous day) to 3:30 am in CT, working hours of 9:00 am to 6:00 pm in ACDT correspond to 5:30 pm (previous day) to 2:30 am in CT, or working hours of 9:00 am to 6:00 pm in ACDT correspond to 4:30 pm (previous day) to 1:30 am in CT.Depending on seasonal clock changes, working hours of 09:00 to 18:00 in ACST correspond to 18:30 (previous day) to 03:30 in CT, working hours of 09:00 to 18:00 in ACDT correspond to 17:30 (previous day) to 02:30 in CT, or working hours of 09:00 to 18:00 in ACDT correspond to 16:30 (previous day) to 01:30 in CT.

Compare ACDT time with CT 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 15 hours and 30 minutes ahead of Central Daylight Time.
10:30 pm22:30 in ACDT is 7:00 am07:00 in CDT

ACDT to CDT call time
Best time for a conference call or a meeting is between 9am-9:30am09:00-09:30 in ACDT which corresponds to 5:30pm-6pm17:30-18:00 in CDT (previous day)

10:30 pm22:30 Australian Central Daylight Time (ACDT). Offset UTC +10:30 hours
7:00 am07:00 Central Daylight Time (CDT). Offset UTC -5:00 hours

10:30 pm22:30 ACDT / 7:00 am07:00 CDT

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Hourly time comparison
ACDTCT
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Australian Central Daylight Time

Offset: ACDT is 10 hours and 30 minutes ahead of Greenwich Mean Time (GMT).

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 Mount Gambier, Mount Barker, Whyalla, Gawler.

Map of the areas on Australian Central Daylight Time (ACDT)
ACDT part of the year

Today all shaded areas are on ACDT.

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).

123456789101112Start: Australian Central Daylight Time (ACDT) started on Sunday, October 4, 2026 at 2:00 am02:00 local time and clocks were set one hour forward to Sunday, October 4, 2026, 3:00 am03:00. Daylight saving starts annually on the first Sunday of October.

123456789101112End: Australian Central Daylight Time (ACDT) ends on Sunday, April 4, 2027 at 3:00 am03:00 local time and clocks are set one hour back to Sunday, April 4, 2027, 2:00 am02:00 local standard time instead. Daylight saving ends annually on the first Sunday of April.

See Australia daylight saving time and upcoming clock changes worldwide.

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 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, El Salvador, Guatemala, Honduras, Mexico, Nicaragua, United States

Principal Cities: The largest city in the CT time zone is Mexico City in Mexico, with about 12.294 million people. Other major cities in this time zone include Chicago, Houston, Puebla, Santiago de Querétaro.

French: HNC - Heure Normale du Centre

Spanish: CT - Tiempo Central Estándar, CT - Zona Centro

Map of the areas on Central Time (CT)
CT all year CT part of the year

Today the lighter areas are on UTC−6 (Central Standard Time, MDT).

CT 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 CT
  • S - short form of 'Sierra'
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