ACDT to San Francisco to AEDT to PT to Portland, ME, USA to BST to UTC Time Converter

Time Difference

Australian Central Daylight Time is 18 hours and 30 minutes ahead of PST (Pacific Standard Time). Australian Central Daylight Time is 30 minutes behind Australian Eastern Daylight Time. Australian Central Daylight Time is 18 hours and 30 minutes ahead of Pacific Time. Australian Central Daylight Time is 15 hours and 30 minutes ahead of EST (Eastern Standard Time). Australian Central Daylight Time is 10 hours and 30 minutes ahead of Greenwich Mean Time. Australian Central Daylight Time is 10 hours and 30 minutes ahead of Coordinated Universal Time.
10:30 pm22:30 in ACDT is 4:00 am04:00 in San Francisco, CA, USA and is 11:00 pm23:00 in AEDT and is 4:00 am04:00 in PT and is 7:00 am07:00 in Portland, ME, USA and is 12:00 pm12:00 in GMT and is 12:00 pm12:00 in UTC

ACDT to San Francisco call time
Best time for a conference call or a meeting is between 9am-12:30pm09:00-12:30 in ACDT which corresponds to 2:30pm-6pm14:30-18:00 in San Francisco (previous day).
ACDT to AEDT call time
Best time for a conference call or a meeting is between 9am-5:30pm09:00-17:30 in ACDT which corresponds to 9:30am-6pm09:30-18:00 in AEDT.
ACDT to PT call time
Best time for a conference call or a meeting is between 9am-12:30pm09:00-12:30 in ACDT which corresponds to 2:30pm-6pm14:30-18:00 in PT (previous day).
ACDT to Portland 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 Portland (previous day).
ACDT to GMT call time
Best time for a conference call or a meeting is between 6:30pm-7:30pm18:30-19:30 in ACDT which corresponds to 8am-9am08:00-09:00 in GMT. Their 9am–6pm09:00–18:00 working hours do not overlap; this is a suggested compromise.
ACDT to UTC call time
Best time for a conference call or a meeting is between 6:30pm-7:30pm18:30-19:30 in ACDT which corresponds to 8am-9am08:00-09:00 in UTC. Their 9am–6pm09:00–18:00 working hours do not overlap; this is a suggested compromise.

10:30 pm22:30 Australian Central Daylight Time (ACDT). Offset UTC +10:30 hours
4:00 am04:00 PST (Pacific Standard Time) (San Francisco, CA, USA). Offset UTC -8:00 hours
11:00 pm23:00 Australian Eastern Daylight Time (AEDT). Offset UTC +11:00 hours
4:00 am04:00 Pacific Time (PT). Offset UTC -8:00 hours
7:00 am07:00 EST (Eastern Standard Time) (Portland, ME, USA). Offset UTC -5:00 hours
12:00 pm12:00 Greenwich Mean Time (GMT). Offset UTC 0:00 hours
12:00 pm12:00 Coordinated Universal Time (UTC). Offset UTC 0:00 hours

10:30 pm22:30 ACDT / 4:00 am04:00 San Francisco, CA, USA / 11:00 pm23:00 AEDT / 4:00 am04:00 PT / 7:00 am07:00 Portland, ME, USA / 12:00 pm12:00 GMT / 12:00 pm12:00 UTC

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 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.

End: 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

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 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.

End: Australian Eastern Daylight Time (AEDT) 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.

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

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

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.

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.

Current time in the United Kingdom: UK time now

BST representations, usage and related time zones

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