UTC to GMT to BST to Portland, ME, USA to PT to AEDT to San Francisco to ACDT Time Converter
The United Kingdom is on summer time: BST (UTC+1) until Sun, Oct 29.
Iceland and Ghana stay on GMT (UTC+0).
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7:11 am07:11 UTC (UTC+0), Oct 7, 2023 = 7:11 am07:11 GMT (UTC+0), Oct 7, 2023 = 8:11 am08:11 BST (UTC+1), Oct 7, 2023 = 3:11 am03:11 EDT (UTC-4), Oct 7, 2023 = 12:11 am00:11 PDT (UTC-7), Oct 7, 2023 = 6:11 pm18:11 AEDT (UTC+11), Oct 7, 2023 = 12:11 am00:11 PDT (UTC-7), Oct 7, 2023 = 5:41 pm17:41 ACDT (UTC+10:30), Oct 7, 2023
UTC and GMT have the same local time. UTC is 1 hour behind BST. UTC is 4 hours ahead of Portland. UTC is 7 hours ahead of PDT. UTC is 11 hours behind AEDT. UTC is 7 hours ahead of San Francisco. UTC is 10 hours and 30 minutes behind ACDT.
How the time difference changes
UTC to GMT
UTC and GMT have the same time year-round.
Working hours of 9:00 am to 6:00 pm in UTC correspond to 9:00 am to 6:00 pm in GMT.Working hours of 09:00 to 18:00 in UTC correspond to 09:00 to 18:00 in GMT.
UTC to BST
For most of the year, UTC is 1 hour behind BST. From Oct 25, 2026 to Mar 28, 2027, and from Oct 31, 2027 to Mar 26, 2028, UTC and GMT have the same time.
For most of the year, working hours of 9:00 am to 6:00 pm in UTC correspond to 10:00 am to 7:00 pm in BST. At other times of the year, working hours of 9:00 am to 6:00 pm in UTC correspond to 9:00 am to 6:00 pm in GMT.For most of the year, working hours of 09:00 to 18:00 in UTC correspond to 10:00 to 19:00 in BST. At other times of the year, working hours of 09:00 to 18:00 in UTC correspond to 09:00 to 18:00 in GMT.
UTC to Portland, ME, USA
For most of the year, UTC is 4 hours ahead of Portland, ME, USA. From Nov 1, 2026 to Mar 14, 2027, and from Nov 7, 2027 to Mar 12, 2028, UTC is 5 hours ahead of Portland, ME, USA.
For most of the year, working hours of 9:00 am to 6:00 pm in UTC correspond to 5:00 am to 2:00 pm in Portland, ME, USA. At other times of the year, working hours of 9:00 am to 6:00 pm in UTC correspond to 4:00 am to 1:00 pm in Portland, ME, USA.For most of the year, working hours of 09:00 to 18:00 in UTC correspond to 05:00 to 14:00 in Portland, ME, USA. At other times of the year, working hours of 09:00 to 18:00 in UTC correspond to 04:00 to 13:00 in Portland, ME, USA.
UTC to PT
For most of the year, UTC is 7 hours ahead of PT. From Nov 1, 2026 to Mar 14, 2027, and from Nov 7, 2027 to Mar 12, 2028, UTC is 8 hours ahead of PT.
For most of the year, working hours of 9:00 am to 6:00 pm in UTC correspond to 2:00 am to 11:00 am in PT. At other times of the year, working hours of 9:00 am to 6:00 pm in UTC correspond to 1:00 am to 10:00 am in PT.For most of the year, working hours of 09:00 to 18:00 in UTC correspond to 02:00 to 11:00 in PT. At other times of the year, working hours of 09:00 to 18:00 in UTC correspond to 01:00 to 10:00 in PT.
UTC to AEDT
Depending on seasonal clock changes, UTC is 10 hours behind AEST or UTC is 11 hours behind AEDT.
Depending on seasonal clock changes, working hours of 9:00 am to 6:00 pm in UTC correspond to 7:00 pm to 4:00 am (next day) in AEST or working hours of 9:00 am to 6:00 pm in UTC correspond to 8:00 pm to 5:00 am (next day) in AEDT.Depending on seasonal clock changes, working hours of 09:00 to 18:00 in UTC correspond to 19:00 to 04:00 (next day) in AEST or working hours of 09:00 to 18:00 in UTC correspond to 20:00 to 05:00 (next day) in AEDT.
UTC to San Francisco
For most of the year, UTC is 7 hours ahead of San Francisco. From Nov 1, 2026 to Mar 14, 2027, and from Nov 7, 2027 to Mar 12, 2028, UTC is 8 hours ahead of San Francisco.
For most of the year, working hours of 9:00 am to 6:00 pm in UTC correspond to 2:00 am to 11:00 am in San Francisco. At other times of the year, working hours of 9:00 am to 6:00 pm in UTC correspond to 1:00 am to 10:00 am in San Francisco.For most of the year, working hours of 09:00 to 18:00 in UTC correspond to 02:00 to 11:00 in San Francisco. At other times of the year, working hours of 09:00 to 18:00 in UTC correspond to 01:00 to 10:00 in San Francisco.
UTC to ACDT
Depending on seasonal clock changes, UTC is 9 hours and 30 minutes behind ACST or UTC is 10 hours and 30 minutes behind ACDT.
Depending on seasonal clock changes, working hours of 9:00 am to 6:00 pm in UTC correspond to 6:30 pm to 3:30 am (next day) in ACST or working hours of 9:00 am to 6:00 pm in UTC correspond to 7:30 pm to 4:30 am (next day) in ACDT.Depending on seasonal clock changes, working hours of 09:00 to 18:00 in UTC correspond to 18:30 to 03:30 (next day) in ACST or working hours of 09:00 to 18:00 in UTC correspond to 19:30 to 04:30 (next day) in ACDT.
Compare UTC time with GMT, BST, Portland, PT, AEDT, San Francisco, and ACDT time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
Coordinated Universal Time and Greenwich Mean Time have the same local time. Coordinated Universal Time is 1 hour behind British Summer Time. Coordinated Universal Time is 4 hours ahead of EDT (Eastern Daylight Time). Coordinated Universal Time is 7 hours ahead of Pacific Daylight Time. Coordinated Universal Time is 11 hours behind Australian Eastern Daylight Time. Coordinated Universal Time is 7 hours ahead of PDT (Pacific Daylight Time). Coordinated Universal Time is 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 6:11 pm18:11 in AEDT 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-6pm09:00-18:00 in UTC which corresponds to 9am-6pm09:00-18:00 in GMT.
UTC to BST call time
Best time for a conference call or a meeting is between 9am-5pm09:00-17:00 in UTC which corresponds to 10am-6pm10:00-18:00 in BST.
UTC to Portland call time
Best time for a conference call or a meeting is between 1pm-6pm13:00-18:00 in UTC which corresponds to 9am-2pm09:00-14:00 in Portland.
UTC to PDT call time
Best time for a conference call or a meeting is between 4pm-6pm16:00-18:00 in UTC which corresponds to 9am-11am09:00-11:00 in PDT.
UTC to AEDT call time
Best time for a conference call or a meeting is between 7:30am-8:30am07:30-08:30 in UTC which corresponds to 6:30pm-7:30pm18:30-19:30 in AEDT. Their 9am–6pm09:00–18:00 working hours do not overlap; this is a suggested compromise.
UTC to San Francisco call time
Best time for a conference call or a meeting is between 4pm-6pm16:00-18:00 in UTC which corresponds to 9am-11am09:00-11:00 in San Francisco.
UTC to ACDT call time
Best time for a conference call or a meeting is between 8am-9am08:00-09:00 in UTC which corresponds to 6:30pm-7:30pm18:30-19:30 in ACDT. Their 9am–6pm09:00–18:00 working hours do not overlap; this is a suggested compromise.
7:11 am07:11 Coordinated Universal Time (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
6:11 pm18:11 Australian Eastern Daylight Time (AEDT). Offset UTC +11:00 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 / 6:11 pm18:11 AEDT / 12:11 am00:11 San Francisco, CA, USA / 5:41 pm17:41 ACDT
Choose an hour to update the converter. Day labels such as “next day” or “+1” are relative to the selected date in the first column. Use Up and Down arrow keys, Home or End to move between hours, then Enter or Space to select.
| UTC | GMT | BST | Portland, ME, USA | PT | AEDT | San Francisco, CA, USA | ACDT |
|---|---|---|---|---|---|---|---|
| 12:00am | 1:00am | 8:00pm previous day | 5:00pm previous day | 11:00am | 5:00pm previous day | 10:30am | |
| 1:00am | 2:00am | 9:00pm previous day | 6:00pm previous day | 12:00pm | 6:00pm previous day | 11:30am | |
| 2:00am | 3:00am | 10:00pm previous day | 7:00pm previous day | 1:00pm | 7:00pm previous day | 12:30pm | |
| 3:00am | 4:00am | 11:00pm previous day | 8:00pm previous day | 2:00pm | 8:00pm previous day | 1:30pm | |
| 4:00am | 5:00am | 12:00am | 9:00pm previous day | 3:00pm | 9:00pm previous day | 2:30pm | |
| 5:00am | 6:00am | 1:00am | 10:00pm previous day | 4:00pm | 10:00pm previous day | 3:30pm | |
| 6:00am | 7:00am | 2:00am | 11:00pm previous day | 5:00pm | 11:00pm previous day | 4:30pm | |
| 7:00am | 8:00am | 3:00am | 12:00am | 6:00pm | 12:00am | 5:30pm | |
| 8:00am | 9:00am | 4:00am | 1:00am | 7:00pm | 1:00am | 6:30pm | |
| 9:00am | 10:00am | 5:00am | 2:00am | 8:00pm | 2:00am | 7:30pm | |
| 10:00am | 11:00am | 6:00am | 3:00am | 9:00pm | 3:00am | 8:30pm | |
| 11:00am | 12:00pm | 7:00am | 4:00am | 10:00pm | 4:00am | 9:30pm | |
| 12:00pm | 1:00pm | 8:00am | 5:00am | 11:00pm | 5:00am | 10:30pm | |
| 1:00pm | 2:00pm | 9:00am | 6:00am | 12:00am next day | 6:00am | 11:30pm | |
| 2:00pm | 3:00pm | 10:00am | 7:00am | 1:00am next day | 7:00am | 12:30am next day | |
| 3:00pm | 4:00pm | 11:00am | 8:00am | 2:00am next day | 8:00am | 1:30am next day | |
| 4:00pm | 5:00pm | 12:00pm | 9:00am | 3:00am next day | 9:00am | 2:30am next day | |
| 5:00pm | 6:00pm | 1:00pm | 10:00am | 4:00am next day | 10:00am | 3:30am next day | |
| 6:00pm | 7:00pm | 2:00pm | 11:00am | 5:00am next day | 11:00am | 4:30am next day | |
| 7:00pm | 8:00pm | 3:00pm | 12:00pm | 6:00am next day | 12:00pm | 5:30am next day | |
| 8:00pm | 9:00pm | 4:00pm | 1:00pm | 7:00am next day | 1:00pm | 6:30am next day | |
| 9:00pm | 10:00pm | 5:00pm | 2:00pm | 8:00am next day | 2:00pm | 7:30am next day | |
| 10:00pm | 11:00pm | 6:00pm | 3:00pm | 9:00am next day | 3:00pm | 8:30am next day | |
| 11:00pm | 12:00am next day | 7:00pm | 4:00pm | 10:00am next day | 4:00pm | 9:30am next day | |
| 00:00 | 01:00 | 20:00 previous day | 17:00 previous day | 11:00 | 17:00 previous day | 10:30 | |
| 01:00 | 02:00 | 21:00 previous day | 18:00 previous day | 12:00 | 18:00 previous day | 11:30 | |
| 02:00 | 03:00 | 22:00 previous day | 19:00 previous day | 13:00 | 19:00 previous day | 12:30 | |
| 03:00 | 04:00 | 23:00 previous day | 20:00 previous day | 14:00 | 20:00 previous day | 13:30 | |
| 04:00 | 05:00 | 00:00 | 21:00 previous day | 15:00 | 21:00 previous day | 14:30 | |
| 05:00 | 06:00 | 01:00 | 22:00 previous day | 16:00 | 22:00 previous day | 15:30 | |
| 06:00 | 07:00 | 02:00 | 23:00 previous day | 17:00 | 23:00 previous day | 16:30 | |
| 07:00 | 08:00 | 03:00 | 00:00 | 18:00 | 00:00 | 17:30 | |
| 08:00 | 09:00 | 04:00 | 01:00 | 19:00 | 01:00 | 18:30 | |
| 09:00 | 10:00 | 05:00 | 02:00 | 20:00 | 02:00 | 19:30 | |
| 10:00 | 11:00 | 06:00 | 03:00 | 21:00 | 03:00 | 20:30 | |
| 11:00 | 12:00 | 07:00 | 04:00 | 22:00 | 04:00 | 21:30 | |
| 12:00 | 13:00 | 08:00 | 05:00 | 23:00 | 05:00 | 22:30 | |
| 13:00 | 14:00 | 09:00 | 06:00 | 00:00 next day | 06:00 | 23:30 | |
| 14:00 | 15:00 | 10:00 | 07:00 | 01:00 next day | 07:00 | 00:30 next day | |
| 15:00 | 16:00 | 11:00 | 08:00 | 02:00 next day | 08:00 | 01:30 next day | |
| 16:00 | 17:00 | 12:00 | 09:00 | 03:00 next day | 09:00 | 02:30 next day | |
| 17:00 | 18:00 | 13:00 | 10:00 | 04:00 next day | 10:00 | 03:30 next day | |
| 18:00 | 19:00 | 14:00 | 11:00 | 05:00 next day | 11:00 | 04:30 next day | |
| 19:00 | 20:00 | 15:00 | 12:00 | 06:00 next day | 12:00 | 05:30 next day | |
| 20:00 | 21:00 | 16:00 | 13:00 | 07:00 next day | 13:00 | 06:30 next day | |
| 21:00 | 22:00 | 17:00 | 14:00 | 08:00 next day | 14:00 | 07:30 next day | |
| 22:00 | 23:00 | 18:00 | 15:00 | 09:00 next day | 15:00 | 08:30 next day | |
| 23:00 | 00:00 next day | 19:00 | 16:00 | 10:00 next day | 16:00 | 09:30 next day |
Coordinated Universal Time
Offset: UTC is the same as Greenwich Mean Time (GMT).
Countries using this time zone: Antarctica, Burkina Faso, Faroe Islands, Gambia, Ghana, Greenland, Guernsey, Guinea, Guinea-Bissau, Iceland, Ireland, Isle of Man, Ivory Coast, Jersey, Liberia, Mali, Mauritania, Morocco, Portugal, Saint Helena, São Tomé and Príncipe, Senegal, Sierra Leone, Spain, Togo, United Kingdom, Western Sahara
Principal Cities: The largest city in the UTC time zone is London in the United Kingdom, with about 8.962 million people. Other major cities in this time zone include Abidjan, Bamako, Casablanca, Dakar.
Coordinated Universal Time (UTC) is the world time standard that regulates clocks and time. It is the successor to Greenwich Mean Time (GMT). For casual use, UTC is the same as GMT, but UTC is the standard the scientific community uses.
UTC has been the time standard commonly used across the world since 1972. It is used in many technical fields, such as aviation and meteorology, and to synchronize time across internet networks.
UTC representations, usage and related time zones
- Z - is the zone designator for the zero UTC/GMT offset, also known as 'Zulu' time
- +00 - basic short
- +0000 - basic
- +00:00 - extended
- +0000 - sign character (+) followed by a four digit time providing hours (00) and minutes (00) of the offset. Indicates the zero UTC/GMT offset.
- Zulu - Military abbreviation for UTC
- Z - short form of 'Zulu'
- Etc/UCT
- Etc/UTC
- Etc/Universal
- Etc/Zulu
- UCT
- UTC
- Universal
- Zulu
- EGST - Eastern Greenland Summer Time
- GMT - Greenwich Mean Time
- WET - Western European Time
- AZOST - Azores Summer Time
- UTC - Coordinated Universal Time
- WT - Western Sahara Standard Time
- Z - Zulu Time Zone
Greenwich Mean Time
Offset: GMT is the same as Greenwich Mean Time (GMT).
Countries using this time zone: Antarctica, Burkina Faso, Gambia, Ghana, Greenland, Guernsey, Guinea, Guinea-Bissau, Iceland, Ireland, Isle of Man, Ivory Coast, Jersey, Liberia, Mali, Mauritania, Morocco, Saint Helena, São Tomé and Príncipe, Senegal, Sierra Leone, Togo, United Kingdom, Western Sahara
Principal Cities: The largest city in the GMT time zone is London in the United Kingdom, with about 8.962 million people. Other major cities in this time zone include Abidjan, Bamako, Casablanca, Dakar.
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 the two are the same. In the military, GMT is known as Zulu time. Greenwich Mean Time was the same as Universal Time (UT), a standard astronomical concept used in many technical fields, until the introduction of UTC in 1972.
GMT representations, usage and related time zones
- Z - is the zone designator for the zero UTC/GMT offset, also known as 'Zulu' time
- +00 - basic short
- +0000 - basic
- +00:00 - extended
- +0000 - sign character (+) followed by a four digit time providing hours (00) and minutes (00) of the offset. Indicates the zero UTC/GMT offset.
- Zulu - Military abbreviation for GMT
- Z - short form of 'Zulu'
- 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
- EGST - Eastern Greenland Summer Time
- GMT - Greenwich Mean Time
- WET - Western European Time
- AZOST - Azores Summer Time
- UTC - Coordinated Universal Time
- WT - Western Sahara Standard Time
- Z - Zulu Time Zone
British Summer Time
Offset: BST is 1 hour ahead of Greenwich Mean Time (GMT).
Countries using this time zone: Guernsey, Isle of Man, Jersey, United Kingdom
Principal Cities: The largest city in the BST time zone is London in the United Kingdom, with about 8.962 million people. Other major cities in this time zone include Birmingham, Glasgow, Manchester, Sheffield.
Current time in the United Kingdom: UK time now
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).
Start: British Summer Time (BST) started on Sunday, March 26, 2023 at 1:00 am01:00 local time and clocks were set one hour forward to Sunday, March 26, 2023, 2:00 am02:00. Daylight saving starts annually on the last Sunday of March.
End: British Summer Time (BST) ends on Sunday, October 29, 2023 at 2:00 am02:00 local time and clocks are set one hour back to Sunday, October 29, 2023, 1:00 am01:00 local standard time instead. Daylight saving ends annually on the last Sunday of October.
See United Kingdom daylight saving time and upcoming clock changes worldwide.
BST representations, usage and related time zones
- +01 - basic short
- +0100 - basic
- +01:00 - extended
- +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.
- Alpha - Military abbreviation for BST
- A - short form of 'Alpha'
- Europe/Belfast
- Europe/Guernsey
- Europe/Isle_of_Man
- Europe/Jersey
- Europe/London
- GB
- GB-Eire
- British Summer Time - UTC +1
- Bangladesh Standard Time - UTC +6
- Bougainville Standard Time - UTC +11
- 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 Time Zone and Facts
Time Zone
EDT – Eastern Daylight Time, UTC-4 (daylight saving time)
Portland Facts
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 North America. 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 United States and the Northwestern part of Mexico. From November 1, 2026, most of British Columbia in Canada keeps UTC-7 all year instead.
Countries using this time zone: Mexico, United States
Principal Cities: The largest city in the PT time zone is Los Angeles in the United States, with about 3.821 million people. Other major cities in this time zone include Tijuana, San Diego, Mexicali, San Jose.
French: HNP - Heure Normale du Pacifique
Spanish: PT - Tiempo del Pacífico, PT - Zona Noroeste
PT representations, usage and related time zones
- -08 - basic short
- -0800 - basic
- -08:00 - extended
- -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.
- Uniform - Military abbreviation for PT
- U - short form of 'Uniform'
- AKDT - Alaska Daylight Time
- PST - Pacific Standard Time
- PT - Pacific Time
- PST - Pitcairn Standard Time
- U - Uniform Time Zone
Australian Eastern Daylight Time
Offset: AEDT is 11 hours ahead of Greenwich Mean Time (GMT).
Countries using this time zone: Australia
Principal Cities: The largest city in the AEDT time zone is Sydney in Australia, with about 5.639 million people. Other major cities in this time zone include Melbourne, Newcastle, Canberra, Central Coast.
Daylight Saving: Australian Eastern Daylight Time (AEDT) is a daylight saving/summer time zone. During winter, some places set clocks back one hour and observe Australian Eastern Standard Time (AEST).
Start: Australian Eastern Daylight Time (AEDT) started on Sunday, October 1, 2023 at 2:00 am02:00 local time and clocks were set one hour forward to Sunday, October 1, 2023, 3:00 am03:00. Daylight saving starts annually on the first Sunday of October.
End: Australian Eastern Daylight Time (AEDT) ends on Sunday, April 7, 2024 at 3:00 am03:00 local time and clocks are set one hour back to Sunday, April 7, 2024, 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.
Australian Eastern Daylight Time (AEDT) is observer in New South Wales (except Broken Hill and Lord Howe Island), Victoria, Tasmania, Australian Capital Territory, Sydney, Melbourne, Hobart, Canberra AEDT is equal to Coordinated Universal Time plus 11 hours (UTC +11). During a summer time period, these locations move from AEST to Australian Eastern Daylight Time (AEDT), and clocks are advanced to UTC +11.
Daylight saving or summer time is commonly expressed as AEDT (Australian Eastern Daylight Time). In periods of daylight saving an hour is added to the Local Standard Time.
The regulation of time is a State Government responsibility. Changes to the period of daylight saving may be made by regulation. Legislation to harmonise daylight saving in NSW with the south-eastern states and the ACT was passed by the NSW Parliament on 23 October 2007.
History of daylight saving in New South Wales
Daylight saving operated nationally for single summer during World War I from 1 January 1917 to 25 March 1917 and during World War II for three summers in a row, starting on 1 January 1942.
Daylight saving was re-introduced for third time in New South Wales on 31 October 1971 after New South Wales Parliament passed the Standard Time Act 1971.
A referendum held on 1 May 1976 proposed that daylight saving should be on a permanent basis. The ballot paper stated:
"At present there is a period commonly called 'daylight saving' by which time is advanced by one hour for the period commencing on the last Sunday in October in each year and ending on the first Sunday in March in the following year.
Electors were then asked to answer YES or NO to the question: Are you in favour of daylight saving? 1,882,770 electors were in favour, 868,900 were against and 35,507 votes were informal.\"
The period of daylight saving is prescribed by the Daylight Saving Regulations 2008, made under the Daylight Saving Act 2007. Since April 2008, daylight saving has been synchronised across Tasmania, New South Wales, Victoria, the ACT and South Australia, although South Australia remains half an hour behind throughout the year due to the observance of Australian Central Standard Time.
Which is correct Daylight Savings or Daylight Saving (with or without the 's' at the end)? The correct spelling in Australia is without the 's'.
AEDT representations, usage and related time zones
- +11 - basic short
- +1100 - basic
- +11:00 - extended
- +1100 - sign character (+) followed by a four digit time providing hours (11) and minutes (00) of the offset. Indicates an offset of eleven hours to the east of the zero meridian.
- Lima - Military abbreviation for AEDT
- L - short form of 'Lima'
- Antarctica/Macquarie
- Australia/ACT
- Australia/Canberra
- Australia/Currie
- Australia/Hobart
- Australia/Melbourne
- Australia/NSW
- Australia/Sydney
- Australia/Tasmania
- Australia/Victoria
- AEDT - Australian Eastern Daylight Time
- BST - Bougainville Standard Time
- KOST - Kosrae Time
- L - Lima Time Zone
- LHDT - Lord Howe Daylight Time
- MAGT - Magadan Time
- NCT - New Caledonia Time
- NFT - Norfolk Time
- PONT - Pohnpei Standard Time
- SBT - Solomon Islands Time
- VLAST - Vladivostok Summer Time
- VUT - Vanuatu Time
San Francisco Time Zone and Facts
Time Zone
PDT – Pacific Daylight Time, UTC-7 (daylight saving time)
San Francisco Facts
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.
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).
Start: Australian Central Daylight Time (ACDT) started on Sunday, October 1, 2023 at 2:00 am02:00 local time and clocks were set one hour forward to Sunday, October 1, 2023, 3:00 am03:00. Daylight saving starts annually on the first Sunday of October.
End: Australian Central Daylight Time (ACDT) ends on Sunday, April 7, 2024 at 3:00 am03:00 local time and clocks are set one hour back to Sunday, April 7, 2024, 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
- +1030 - basic
- +10:30 - extended
- +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.
- Australia/Adelaide
- Australia/Broken_Hill
- Australia/South
- Australia/Yancowinna
- ACDT - Australian Central Daylight Time
- LHST - Lord Howe Standard Time
