UTC
Universal Time Coordinated
GMT +0
Sat, Oct 7
12am
3am
6am
9am
12pm
3pm
6pm
9pm
GMT
Greenwich Mean Time
GMT +0
Sat, Oct 7
12am
3am
6am
9am
12pm
3pm
6pm
9pm
BST
British Summer Time
GMT +1
Sat, Oct 7
12am
3am
6am
9am
12pm
3pm
6pm
9pm
Maine, USA
EDT
Sat, Oct 7
12am
3am
6am
9am
12pm
3pm
6pm
9pm
PT/PDT
Pacific Time
GMT -7
Sat, Oct 7
12am
3am
6am
9am
12pm
3pm
6pm
9pm
PT is not used on this date
This converter uses PDT (GMT -7), the offset Los Angeles uses on this date. Open the PDT converter.
AEST
Australian Eastern Standard Time
GMT +10
Sat, Oct 7
12am
3am
6am
9am
12pm
3pm
6pm
9pm
Eastern Australia uses AEST and AEDT on October 7, 2023

Queensland uses AEST. Sydney and Melbourne use AEDT.

California, USA
PDT
Sat, Oct 7
12am
3am
6am
9am
12pm
3pm
6pm
9pm
ACDT
Australian Central Daylight Time
GMT +10:30
Sat, Oct 7
12am
3am
6am
9am
12pm
3pm
6pm
9pm

Compare UTC time with GMT, BST, Portland, PT, AEST, San Francisco, and ACDT time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.

Time Difference

Universal Time Coordinated is 0 hours ahead of Greenwich Mean Time and 1 hour behind British Summer Time and 4 hours ahead of EDT (Eastern Daylight Time) and 7 hours ahead of Pacific Daylight Time and 10 hours behind Australian Eastern Standard Time and 7 hours ahead of PDT (Pacific Daylight Time) and 10 hours and 30 minutes behind Australian Central Daylight Time
7:11 am07:11 in UTC is 7:11 am07:11 in GMT and is 8:11 am08:11 in BST and is 3:11 am03:11 in Portland, ME, USA and is 12:11 am00:11 in PDT and is 5:11 pm17:11 in AEST and is 12:11 am00:11 in San Francisco, CA, USA and is 5:41 pm17:41 in ACDT

UTC to GMT call time
Best time for a conference call or a meeting is between 9am-5pm in UTC which corresponds to 9am-5pm in GMT
UTC to BST call time
Best time for a conference call or a meeting is between 9am-4pm in UTC which corresponds to 10am-5pm in BST
UTC to Portland call time
Best time for a conference call or a meeting is between 1pm-5pm in UTC which corresponds to 9am-1pm in Portland
UTC to PDT call time
Best time for a conference call or a meeting is between 4pm-5pm in UTC which corresponds to 9am-10am in PDT
UTC to AEST call time
Best time for a conference call or a meeting is between 7:30am-8:30am in UTC which corresponds to 5:30pm-6:30pm in AEST
UTC to San Francisco call time
Best time for a conference call or a meeting is between 4pm-5pm in UTC which corresponds to 9am-10am in San Francisco
UTC to ACDT call time
Best time for a conference call or a meeting is between 7:30am-8:30am in UTC which corresponds to 6pm-7pm in ACDT

7:11 am07:11 Universal Time Coordinated (UTC). Offset UTC 0:00 hours
7:11 am07:11 Greenwich Mean Time (GMT). Offset UTC 0:00 hours
8:11 am08:11 British Summer Time (BST). Offset UTC +1:00 hour
3:11 am03:11 EDT (Eastern Daylight Time) (Portland, ME, USA). Offset UTC -4:00 hours
12:11 am00:11 Pacific Daylight Time (PDT). Offset UTC -7:00 hours
5:11 pm17:11 Australian Eastern Standard Time (AEST). Offset UTC +10:00 hours
12:11 am00:11 PDT (Pacific Daylight Time) (San Francisco, CA, USA). Offset UTC -7:00 hours
5:41 pm17:41 Australian Central Daylight Time (ACDT). Offset UTC +10:30 hours

7:11 am07:11 UTC / 7:11 am07:11 GMT / 8:11 am08:11 BST / 3:11 am03:11 Portland, ME, USA / 12:11 am00:11 PDT / 5:11 pm17:11 AEST / 12:11 am00:11 San Francisco, CA, USA / 5:41 pm17:41 ACDT

UTCGMTBSTPortland, ME, USAPTAESTSan Francisco, CA, USAACDT
12am (midnight)12am (midnight)1am8pm5pm10am5pm10:30 am
1am1am2am9pm6pm11am6pm11:30 am
2am2am3am10pm7pm12pm (noon)7pm12:30 pm
3am3am4am11pm8pm1pm8pm1:30 pm
4am4am5am12am (midnight)9pm2pm9pm2:30 pm
5am5am6am1am10pm3pm10pm3:30 pm
6am6am7am2am11pm4pm11pm4:30 pm
7am7am8am3am12am (midnight)5pm12am (midnight)5:30 pm
8am8am9am4am1am6pm1am6:30 pm
9am9am10am5am2am7pm2am7:30 pm
10am10am11am6am3am8pm3am8:30 pm
11am11am12pm (noon)7am4am9pm4am9:30 pm
12pm (noon)12pm (noon)1pm8am5am10pm5am10:30 pm
1pm1pm2pm9am6am11pm6am11:30 pm
2pm2pm3pm10am7am12am (midnight)7am12:30 am
3pm3pm4pm11am8am1am8am1:30 am
4pm4pm5pm12pm (noon)9am2am9am2:30 am
5pm5pm6pm1pm10am3am10am3:30 am
6pm6pm7pm2pm11am4am11am4:30 am
7pm7pm8pm3pm12pm (noon)5am12pm (noon)5:30 am
8pm8pm9pm4pm1pm6am1pm6:30 am
9pm9pm10pm5pm2pm7am2pm7:30 am
10pm10pm11pm6pm3pm8am3pm8:30 am
11pm11pm12am (midnight)7pm4pm9am4pm9:30 am
00:0000:0001:0020:0017:0010:0017:0010:30
01:0001:0002:0021:0018:0011:0018:0011:30
02:0002:0003:0022:0019:0012:0019:0012:30
03:0003:0004:0023:0020:0013:0020:0013:30
04:0004:0005:0000:0021:0014:0021:0014:30
05:0005:0006:0001:0022:0015:0022:0015:30
06:0006:0007:0002:0023:0016:0023:0016:30
07:0007:0008:0003:0000:0017:0000:0017:30
08:0008:0009:0004:0001:0018:0001:0018:30
09:0009:0010:0005:0002:0019:0002:0019:30
10:0010:0011:0006:0003:0020:0003:0020:30
11:0011:0012:0007:0004:0021:0004:0021:30
12:0012:0013:0008:0005:0022:0005:0022:30
13:0013:0014:0009:0006:0023:0006:0023:30
14:0014:0015:0010:0007:0000:0007:0000:30
15:0015:0016:0011:0008:0001:0008:0001:30
16:0016:0017:0012:0009:0002:0009:0002:30
17:0017:0018:0013:0010:0003:0010:0003:30
18:0018:0019:0014:0011:0004:0011:0004:30
19:0019:0020:0015:0012:0005:0012:0005:30
20:0020:0021:0016:0013:0006:0013:0006:30
21:0021:0022:0017:0014:0007:0014:0007:30
22:0022:0023:0018:0015:0008:0015:0008:30
23:0023:0000:0019:0016:0009:0016:0009:30

Universal Time Coordinated

Offset: UTC is 0 hours ahead Greenwich Mean Time (GMT) and is used in Universal

Coordinated Universal Time (UTC) is the world time standard that regulates clocks and time. It is successor to Greenwich Mean Time (GMT). For casual use, UTC is the same as GMT, but is used by the scientific community.
UTC is the time standard commonly used across the world since 1972. It is used in many technical fields, like aviation industry and meteorologists, also used to synchronize time across internet networks.

UTC representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • Z - is the zone designator for the zero UTC/GMT offset, also known as 'Zulu' time
  • +00 - basic short
  • +0000 - basic
  • +00:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +0000 - sign character (+) followed by a four digit time providing hours (00) and minutes (00) of the offset. Indicates the zero UTC/GMT offset.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Zulu - Military abbreviation for UTC
  • Z - short form of 'Zulu'
IANA/Olson: Reflects UTC time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Etc/UCT
  • Etc/UTC
  • Etc/Universal
  • Etc/Zulu
  • UCT
  • UTC
  • Universal
  • Zulu
Time zones with the GMT +0 offset:
  • EGST - Eastern Greenland Summer Time
  • GMT - Greenwich Mean Time
  • WET - Western European Time
  • AZOST - Azores Summer Time
  • UTC - Universal Time Coordinated
  • WT - Western Sahara Standard Time
  • Z - Zulu Time Zone

Greenwich Mean Time

Offset: GMT is 0 hours ahead Greenwich Mean Time (GMT) and is used in Europe

Countries using this time zone: Burkina Faso, Côte d'Ivoire, Ghana, Greenland, Gambia, Guinea, Guinea-Bissau, Iceland, Liberia, Mali, Mauritania, St Helena, Sierra Leone, Senegal, Sao Tome & Principe, Togo

Principal Cities: The largest city in the GMT time zone is Abidjan in Ivory Coast, with about 3.677 million people. Other major cities in this time zone include Dakar, Grand Dakar, Accra, Camayenne.

Greenwich Mean Time (GMT) originally referred to the mean solar time at the Royal Observatory in Greenwich, London. It is now often used to refer to Coordinated Universal Time (UTC) when this is viewed as a time zone, and in casual use for the most parts it is the same. In military GMT is known as Zulu time.Greenwich Mean Time was the same as Universal Time (UT), until the introduction of UTC in 1972 a standard astronomical concept used in many technical fields.

GMT Time Zone Geo Map
GMT timezone map

GMT representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • Z - is the zone designator for the zero UTC/GMT offset, also known as 'Zulu' time
  • +00 - basic short
  • +0000 - basic
  • +00:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +0000 - sign character (+) followed by a four digit time providing hours (00) and minutes (00) of the offset. Indicates the zero UTC/GMT offset.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Zulu - Military abbreviation for GMT
  • Z - short form of 'Zulu'
IANA/Olson: Reflects GMT time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Africa/Abidjan
  • Africa/Accra
  • Africa/Bamako
  • Africa/Banjul
  • Africa/Bissau
  • Africa/Conakry
  • Africa/Dakar
  • Africa/Freetown
  • Africa/Lome
  • Africa/Monrovia
  • Africa/Nouakchott
  • Africa/Ouagadougou
  • Africa/Sao_Tome
  • Africa/Timbuktu
  • America/Danmarkshavn
  • Atlantic/Reykjavik
  • Atlantic/St_Helena
  • Eire
  • Etc/GMT
  • Etc/GMT+0
  • Etc/GMT-0
  • Etc/GMT0
  • Etc/Greenwich
  • Europe/Belfast
  • Europe/Dublin
  • Europe/Guernsey
  • Europe/Isle_of_Man
  • Europe/Jersey
  • Europe/London
  • GB
  • GB-Eire
  • GMT
  • GMT+0
  • GMT-0
  • GMT0
  • Greenwich
  • Iceland
Time zones with the GMT +0 offset:
  • EGST - Eastern Greenland Summer Time
  • GMT - Greenwich Mean Time
  • WET - Western European Time
  • AZOST - Azores Summer Time
  • UTC - Universal Time Coordinated
  • WT - Western Sahara Standard Time
  • Z - Zulu Time Zone

British Summer Time

Offset: BST is 1 hour ahead Greenwich Mean Time (GMT) and is used in Europe

Countries using this time zone: Britain (UK), Guernsey, Isle of Man, Jersey

Principal Cities: The largest city in the BST time zone is London in United Kingdom, with about 7.557 million people. Other major cities in this time zone include Birmingham, Glasgow, Liverpool, Saint Helier.

BST Time Zone Geo Map
BST timezone map

Daylight Saving: British Summer Time (BST) is a daylight saving/summer time zone. During winter, some places set clocks back one hour and observe Greenwich Mean Time (GMT).

Daylight saving time clock moves forward for one hour from 1am to 2amStart: British Summer Time (BST) started on Sunday, March 26, 2023 at 1:00 am local time and clocks were set one hour forward to Sunday, March 26, 2023, 2:00 am. Daylight saving starts annually on the last Sunday of March

Daylight saving time clock moves back for one hour from 2am to 1amEnd: British Summer Time (BST) ends on Sunday, October 29, 2023 at 2:00 am local time and clocks are set one hour back to Sunday, October 29, 2023, 1:00 am local standard time instead. Daylight saving ends annually on the last Sunday of October

BST representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +01 - basic short
  • +0100 - basic
  • +01:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +0100 - sign character (+) followed by a four digit time providing hours (01) and minutes (00) of the offset. Indicates an offset of one hour to the east of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Alpha - Military abbreviation for BST
  • A - short form of 'Alpha'
IANA/Olson: Reflects BST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Europe/Belfast
  • Europe/Guernsey
  • Europe/Isle_of_Man
  • Europe/Jersey
  • Europe/London
  • GB
  • GB-Eire
BST Abbreviation: Several time zones share BST abbreviation and it could refer to these time zones
  • British Summer Time - UTC +1
  • Bangladesh Standard Time - UTC +6
  • Bougainville Standard Time - UTC +11
Time zones with the GMT +1 offset:
  • BST - British Summer Time
  • CET - Central European Time
  • IST - Irish Standard Time
  • WEST - Western European Summer Time
  • A - Alpha Time Zone
  • CET - Central European Time
  • MEZ - Mitteleuropäische Zeit
  • WAT - West Africa Time
  • WST - Western Sahara Summer Time
  • BMT - Biel Mean Time

Portland Information

Time Zone

Abbreviation / Name
EDT - Eastern Daylight Time
EST - Eastern Standard Time
UTC / GMT Offset
-4:00 hours during Eastern Daylight Time, currently in use.
-5:00 hours during Eastern Standard Time.
Daylight Saving Time Change
+1:00 hour - DST is in use
Daylight Saving Time Starts
Daylight saving time clock moves forward for one hour from 2am to 3amSunday, March 8, 2026 at 2:00 am local time. DST starts annually on the 2nd Sunday of March. Clocks are turned forward 1 hour to Sunday, March 8, 2026 at 3:00 am local daylight time instead. Also called Spring Forward or Summer Time.
Daylight Saving Time Ends
Daylight saving time clock moves back for one hour from 2am to 1amSunday, November 1, 2026 at 2:00 am local time. DST ends annually on the 1st Sunday of November. Clocks are turned backward 1 hour to Sunday, November 1, 2026 at 1:00 am local standard time instead. Also called Fall Back or switch to Winter Time.

Portland Facts

Country
USA
State
Maine
Alternative Names
Casco, Elbow, Falmouth, Falmouth Neck, Indigreat, Machegony, Machigonne, PWM, Portland, Portland i Maine, Portlandia, Portlant, Portlend, Portlenda, Quack, The Neck, Uh-kos-is-co, bo te lan, bwrtland, portalanda, portalyanda, poteullaendeu, potorando, pwrtlnd, pwrtlnd myn, Πόρτλαντ, Портланд, Портленд, Փորթլենդ, פורטלנד, بورتلاند, ورٹلینڈ، مینے, پورتلند، مین, पोर्टलंड, পোর্টল্যান্ড, ポートランド, 波特蘭, 포틀랜드
Population
66,881
Currency
Dollar (USD)
Geographic Coordinates
43° 39' N Latitude / 70° 15' W Longitude
International Dialing Code
+1

Pacific Time

Pacific Time (PT) is a general term used to describe the areas that observe either the Pacific Standard Time (PST) or Pacific Daylight Time (PDT) in the United States and Canada. PT also called Pacific Coast Time. PT is not static but switches between PDT and PST.

Territories observing the Pacific Time Zone are primarily in North America. It runs through the western part of Canada, the United States and the Northwestern part of Mexico.

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

Principal Cities: The largest city in the PST time zone is Los Angeles in the United States, with about 3.793 million people. Other major cities in this time zone include Vancouver, Tijuana, San Diego, San Jose.

French: HNP - Heure Normale du Pacifique

Spanish: PT - Tiempo del Pacífico, PT - Zona Noroeste

PT representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • -08 - basic short
  • -0800 - basic
  • -08:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • -0800 - sign character (-) followed by a four digit time providing hours (08) and minutes (00) of the offset. Indicates an offset of eight hours to the west of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Uniform - Military abbreviation for PT
  • U - short form of 'Uniform'
Time zones with the GMT -8 offset:
  • AKDT - Alaska Daylight Time
  • PST - Pacific Standard Time
  • PT - Pacific Time
  • PST - Pitcairn Standard Time
  • U - Uniform Time Zone

Australian Eastern Standard Time

Offset: AEST is 10 hours ahead Greenwich Mean Time (GMT) and is used in Australia

Countries using this time zone: Australia

Principal Cities: The largest city in the AEST time zone is Brisbane in Australia, with about 2.19 million people. Other major cities in this time zone include Gold Coast, Logan City, Townsville, Cairns.

AEST Time Zone Geo Map
AEST 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 Australian Eastern Daylight Time (AEDT).

Daylight saving time clock moves forward for one hour from 2am to 3amEnd: Australian Eastern Standard Time (AEST) ended on Sunday, October 1, 2023 at 2:00 am local time and clocks were set one hour forward to Sunday, October 1, 2023, 3:00 am local daylight time instead. Standard time ends annually on the first Sunday of October.

Daylight saving time clock moves back for one hour from 3am to 2amStart: Australian Eastern Standard Time (AEST) starts on Sunday, April 7, 2024 at 3:00 am local time and clocks are set one hour back to Sunday, April 7, 2024, 2:00 am. Standard time starts annually on the first Sunday of April.

Australian Eastern Standard Time (AEST) is used in Queensland, Victoria, Tasmania, New South Wales (except Broken Hill), Australian Capital Territory and in folling major cities Brisbane, Sydney, Melbourne, Hobart, Canberra

Only part of Australia observe daylight saving. It is used in New South Wales, Victoria, South Australia, Tasmania, and the Australian Capital Territory. Daylight saving is not observed in Queensland, Western Australia or the Northern Territory.

AEST representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +10 - basic short
  • +1000 - basic
  • +10:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +1000 - sign character (+) followed by a four digit time providing hours (10) and minutes (00) of the offset. Indicates an offset of ten hours to the east of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Kilo - Military abbreviation for AEST
  • K - short form of 'Kilo'
IANA/Olson: Reflects AEST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Antarctica/Macquarie
  • Australia/ACT
  • Australia/Brisbane
  • Australia/Canberra
  • Australia/Currie
  • Australia/Hobart
  • Australia/Lindeman
  • Australia/Melbourne
  • Australia/NSW
  • Australia/Queensland
  • Australia/Sydney
  • Australia/Tasmania
  • Australia/Victoria
Time zones with the GMT +10 offset:
  • AEST - Australian Eastern Standard Time
  • CHUT - Chuuk Time
  • ChST - Chamorro Standard Time
  • K - Kilo Time Zone
  • KDT - Korea Daylight Time
  • PGT - Papua New Guinea Time
  • VLAT - Vladivostok Time
  • YAKST - Yakutsk Summer Time
  • YAPT - Yap Time

San Francisco Information

Time Zone

Abbreviation / Name
PDT - Pacific Daylight Time
PST - Pacific Standard Time
UTC / GMT Offset
-7:00 hours during Pacific Daylight Time, currently in use.
-8:00 hours during Pacific Standard Time.
Daylight Saving Time Change
+1:00 hour - DST is in use
Daylight Saving Time Starts
Daylight saving time clock moves forward for one hour from 2am to 3amSunday, March 8, 2026 at 2:00 am local time. DST starts annually on the 2nd Sunday of March. Clocks are turned forward 1 hour to Sunday, March 8, 2026 at 3:00 am local daylight time instead. Also called Spring Forward or Summer Time.
Daylight Saving Time Ends
Daylight saving time clock moves back for one hour from 2am to 1amSunday, November 1, 2026 at 2:00 am local time. DST ends annually on the 1st Sunday of November. Clocks are turned backward 1 hour to Sunday, November 1, 2026 at 1:00 am local standard time instead. Also called Fall Back or switch to Winter Time.

San Francisco Facts

Country
USA
State
California
Alternative Names
Franciscopolis, Frisco, Kapalakiko, Khiu-kim-san, Khiu-kîm-sân, Lungsod ng San Francisco, New Albion, SF, SFO, San Francisco, San Franciscu, San Francisko, San Fransisco, San Fransiskas, San Fransisko, San Frantzisko, San Phransisko, San-Francisko, San-Francyska, San-Fransisko, Sanfrancisko, Sao Francisco, São Francisco, Yerba Buena, can pirancisko, jiu jin shan, saenpeulan, saenpeulansiseuko, saina pharansisako, saina phransisko, san f ran si s ko, san fan shi, san fransskw, san fransyskw, san fransyskۆ, san phransisko, sana phransisako ka'unti, sana phransisko, sanfuranshisuko, sena phransisko, sn prnsysqw, syana phransisko, Σαν Φρανσίσκο, Сан Франсиско, Сан Франциско, Сан-Франциско, Сан-Францыска, Сан-Франціско, Սան Ֆրանցիսկո, סאן פראנציסקא, סן פרנסיסקו, سان فرانسسکو, سان فرانسيسكو, سان فرانسیسکو, سان فرانسیسکۆ, सॅन फ्रान्सिस्को, सैन फ्रांसिस्को, स्यान फ्रान्सिस्को, সান ফ্রান্সিসকো কাউন্টি, সান ফ্রান্সিস্কো, ਸੈਨ ਫਰਾਂਸਿਸਕੋ, சான் பிரான்சிஸ்கோ, శాన్ ఫ్రాన్సిస్కో, സാൻ ഫ്രാൻസിസ്കോ, සැන් ෆ්‍රැන්සිස්කෝ, ซานฟรานซิสโก, སན་ཧྥུ་རན་སིས་ཁོ, ဆန်ဖရန်စစ္စကိုမြို့, სან-ფრანცისკო, サンフランシスコ, 三藩市, 旧金山, 舊金山, 샌프란, 샌프란시스코
Population
864,816
Currency
Dollar (USD)
Geographic Coordinates
37° 46' N Latitude / 122° 25' W Longitude
International Dialing Code
+1

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 1, 2023 at 2:00 am local time and clocks were set one hour forward to Sunday, October 1, 2023, 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 7, 2024 at 3:00 am local time and clocks are set one hour back to Sunday, April 7, 2024, 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