AEST
Australian Eastern Standard Time
GMT +10
AEST is NOT in use by many locations
AEDT (Australian Eastern Daylight Time) is used instead. Switch to AEDT time zone or select one of the cities Sydney, Melbourne, Brisbane for automatic timezone change.
GMT/BST
Greenwich Mean Time
GMT +0
BST automatically adjusted to GMT time zone, that is in use

Time Difference

Australian Eastern Standard Time is 10 hours ahead of Greenwich Mean Time
So 10:00 am10:00 in AEST is 12:00 am00:00 in GMT

10:00 am10:00 Australian Eastern Standard Time (AEST). Offset UTC +10:00 hours
12:00 am00:00 Greenwich Mean Time (GMT). Offset UTC 0:00 hours

10:00 am10:00 AEST / 12:00 am00:00 GMT

AEST GMT
12am (midnight) 2pm
1am 3pm
2am 4pm
3am 5pm
4am 6pm
5am 7pm
6am 8pm
7am 9pm
8am 10pm
9am 11pm
10am 12am (midnight)
11am 1am
12pm (noon) 2am
1pm 3am
2pm 4am
3pm 5am
4pm 6am
5pm 7am
6pm 8am
7pm 9am
8pm 10am
9pm 11am
10pm 12pm (noon)
11pm 1pm
0:00 14:00
1:00 15:00
2:00 16:00
3:00 17:00
4:00 18:00
5:00 19:00
6:00 20:00
7:00 21:00
8:00 22:00
9:00 23:00
10:00 0:00
11:00 1:00
12:00 2:00
13:00 3:00
14:00 4:00
15:00 5:00
16:00 6:00
17:00 7:00
18:00 8:00
19:00 9:00
20:00 10:00
21:00 11:00
22:00 12:00
23:00 13:00

Australian Eastern Standard Time

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

Countries: It is used in following countries: Australia

Principal Cities: The largest city in the AEST timezone is Sydney from Australia with population about 4.627 million people. Other major cities in the area are Melbourne, Brisbane, Gold Coast, Canberra

Daylight Saving: This is a standard timezone, however during summer some places adjust time for one hour forward for daylight saving and observe Australian Eastern Daylight Time (AEDT).

End: AEST ends annually on the same date and time. and clocks were set one hour forward on Sunday, October 6, 2019, at 2:00 (2:00 am) local time.

Start: AEST starts annually on the same date and time. and clocks are set one hour back on Sunday, April 5, 2020, at 3:00 (3:00 am) local time.

AEST Time Zone Geo Map
AEST timezone map

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 ten hour and zero minutes time differences 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
  • 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
  • +10 -
  • JDT -


British Summer Time

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

Countries: It is used in following countries: Britain (UK), Guernsey, Isle of Man, Jersey

Principal Cities: The largest city in the BST timezone is London from United Kingdom with population about 7.557 million people. Other major cities in the area are Birmingham, Glasgow, Liverpool, Saint Helier

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.

BST Time Zone Geo Map
BST timezone map
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 one hour and zero minutes time differences 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 - Mitteleurop√ɬ§ische Zeit
  • WAT - West Africa Time
  • WST - Western Sahara Summer Time
  • BMT - Biel Mean Time
  • +01 -