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ACDT to EST Converter

Updating current time…
ACDT
Australian Central Daylight Time
GMT +10:30
12am
3am
6am
9am
12pm
3pm
6pm
9pm
EST
Eastern Standard Time
GMT -5
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 EST examples

These examples always use ACDT (UTC+10:30) and EST (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 EST.

EST uses UTC-5 during standard time. For Eastern Time that follows daylight saving time, use ACDT to ET. For daylight-time examples, use ACDT to EDT.

How the time difference changes

Depending on seasonal clock changes, ACST is 13 hours and 30 minutes ahead of EDT, ACDT is 14 hours and 30 minutes ahead of EDT, or ACDT is 15 hours and 30 minutes ahead of EST.

Depending on seasonal clock changes, working hours of 9:00 am to 5:00 pm in ACST correspond to 7:30 pm (previous day) to 3:30 am in EDT, working hours of 9:00 am to 5:00 pm in ACDT correspond to 6:30 pm (previous day) to 2:30 am in EDT, or working hours of 9:00 am to 5:00 pm in ACDT correspond to 5:30 pm (previous day) to 1:30 am in EST.

Compare ACDT time with EST 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 Eastern Standard Time
10:30 pm22:30 in ACDT is 7:00 am07:00 in EST

ACDT to EST call time
Best time for a conference call or a meeting is between 8:30am-9:30am in ACDT which corresponds to 5pm-6pm in EST (previous day)

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

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

ACDTEST
12am (midnight)8:30 am
1am9:30 am
2am10:30 am
3am11:30 am
4am12:30 pm
5am1:30 pm
6am2:30 pm
7am3:30 pm
8am4:30 pm
9am5:30 pm
10am6:30 pm
11am7:30 pm
12pm (noon)8:30 pm
1pm9:30 pm
2pm10:30 pm
3pm11:30 pm
4pm12:30 am
5pm1:30 am
6pm2:30 am
7pm3:30 am
8pm4:30 am
9pm5:30 am
10pm6:30 am
11pm7:30 am
00:0008:30
01:0009:30
02:0010:30
03:0011:30
04:0012:30
05:0013:30
06:0014:30
07:0015:30
08:0016:30
09:0017:30
10:0018:30
11:0019:30
12:0020:30
13:0021:30
14:0022:30
15:0023:30
16:0000:30
17:0001:30
18:0002:30
19:0003:30
20:0004:30
21:0005:30
22:0006:30
23:0007:30

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

Eastern Standard Time

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

Countries using this time zone: Bahamas, Canada, Haiti, Jamaica, Cayman Islands, Mexico, Panama, Turks & Caicos Is, United States

Principal Cities: The largest city in the EST time zone is New York City in the United States, with about 8.804 million people. Other major cities in this time zone include Toronto, Brooklyn, Borough of Queens, Montreal.

French: HNE - Heure Normale de l'Est

Spanish: ET - Tiempo del Este, ET - Zona Sureste

EST Time Zone Geo Map
EST 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 Eastern Daylight Time (EDT).

Daylight saving time clock moves back for one hour from 2am to 1amStart: Eastern Standard Time (EST) 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: Eastern Standard Time (EST) 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.

EST 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 EST
  • R - short form of 'Romeo'
IANA/Olson: Reflects EST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • America/Atikokan
  • America/Cancun
  • America/Cayman
  • America/Coral_Harbour
  • America/Detroit
  • America/Fort_Wayne
  • America/Grand_Turk
  • America/Indiana/Indianapolis
  • America/Indiana/Marengo
  • America/Indiana/Petersburg
  • America/Indiana/Vevay
  • America/Indiana/Vincennes
  • America/Indiana/Winamac
  • America/Indianapolis
  • America/Iqaluit
  • America/Jamaica
  • America/Kentucky/Louisville
  • America/Kentucky/Monticello
  • America/Louisville
  • America/Montreal
  • America/Nassau
  • America/New_York
  • America/Nipigon
  • America/Panama
  • America/Pangnirtung
  • America/Port-au-Prince
  • America/Thunder_Bay
  • America/Toronto
  • Canada/Eastern
  • EST
  • EST5EDT
  • Jamaica
  • US/East-Indiana
  • US/Eastern
  • US/Michigan
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