ACST to London to Bangkok Time Converter

Updating current time…
ACST
Australian Central Standard Time
UTC+9:30
12am
3am
6am
9am
12pm
3pm
6pm
9pm
South Australia is on daylight saving time: ACDT (UTC+10:30) until Sun, Apr 4, 2027.

The Northern Territory stays on ACST (UTC+9:30).

London
United KingdomGMT
UTC+0
9h 30m behind
12am
3am
6am
9am
12pm
3pm
6pm
9pm
Bangkok
ThailandICT
UTC+7
2h 30m behind
12am
3am
6am
9am
12pm
3pm
6pm
9pm

Quick answers

Selected conversion

9:30 pm21:30 ACST (UTC+9:30), Nov 14, 2026 = 12:00 pm12:00 GMT (UTC+0), Nov 14, 2026 = 7:00 pm19:00 ICT (UTC+7), Nov 14, 2026

ACST is 9 hours and 30 minutes ahead of London. ACST is 2 hours and 30 minutes ahead of Bangkok.

How the time difference changes

ACST to London

For most of the year, ACST is 8 hours and 30 minutes ahead of London. From Oct 25, 2026 to Mar 28, 2027, and from Oct 31, 2027 to Mar 26, 2028, ACST is 9 hours and 30 minutes ahead of London.

For most of the year, working hours of 9:00 am to 6:00 pm in ACST correspond to 12:30 am to 9:30 am in London. At other times of the year, working hours of 9:00 am to 6:00 pm in ACST correspond to 11:30 pm (previous day) to 8:30 am in London.For most of the year, working hours of 09:00 to 18:00 in ACST correspond to 00:30 to 09:30 in London. At other times of the year, working hours of 09:00 to 18:00 in ACST correspond to 23:30 (previous day) to 08:30 in London.

ACST to Bangkok

ACST is 2 hours and 30 minutes ahead of Bangkok year-round.

Working hours of 9:00 am to 6:00 pm in ACST correspond to 6:30 am to 3:30 pm in Bangkok.Working hours of 09:00 to 18:00 in ACST correspond to 06:30 to 15:30 in Bangkok.

Compare ACST time with London and Bangkok time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.

Time Difference

Australian Central Standard Time is 9 hours and 30 minutes ahead of GMT (Greenwich Mean Time). Australian Central Standard Time is 2 hours and 30 minutes ahead of ICT (Indochina Time).
9:30 pm21:30 in ACST is 12:00 pm12:00 in London, United Kingdom and is 7:00 pm19:00 in Bangkok, Thailand

ACST to London call time
Best time for a conference call or a meeting is between 6pm-7pm18:00-19:00 in ACST which corresponds to 8:30am-9:30am08:30-09:30 in London. Their 9am–6pm09:00–18:00 working hours do not overlap; this is a suggested compromise.
ACST to Bangkok call time
Best time for a conference call or a meeting is between 11:30am-6pm11:30-18:00 in ACST which corresponds to 9am-3:30pm09:00-15:30 in Bangkok.

9:30 pm21:30 Australian Central Standard Time (ACST). Offset UTC +9:30 hours
12:00 pm12:00 GMT (Greenwich Mean Time) (London, United Kingdom). Offset UTC 0:00 hours
7:00 pm19:00 ICT (Indochina Time) (Bangkok, Thailand). Offset UTC +7:00 hours

9:30 pm21:30 ACST / 12:00 pm12:00 London, United Kingdom / 7:00 pm19:00 Bangkok, Thailand

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.

Hourly time comparison
ACSTLondon, United KingdomBangkok, Thailand
2:30pm previous day9:30pm previous day
3:30pm previous day10:30pm previous day
4:30pm previous day11:30pm previous day
5:30pm previous day12:30am
6:30pm previous day1:30am
7:30pm previous day2:30am
8:30pm previous day3:30am
9:30pm previous day4:30am
10:30pm previous day5:30am
11:30pm previous day6:30am
12:30am7:30am
1:30am8:30am
2:30am9:30am
3:30am10:30am
4:30am11:30am
5:30am12:30pm
6:30am1:30pm
7:30am2:30pm
8:30am3:30pm
9:30am4:30pm
10:30am5:30pm
11:30am6:30pm
12:30pm7:30pm
1:30pm8:30pm
14:30 previous day21:30 previous day
15:30 previous day22:30 previous day
16:30 previous day23:30 previous day
17:30 previous day00:30
18:30 previous day01:30
19:30 previous day02:30
20:30 previous day03:30
21:30 previous day04:30
22:30 previous day05:30
23:30 previous day06:30
00:3007:30
01:3008:30
02:3009:30
03:3010:30
04:3011:30
05:3012:30
06:3013:30
07:3014:30
08:3015:30
09:3016:30
10:3017:30
11:3018:30
12:3019:30
13:3020:30

Australian Central Standard Time

Offset: ACST is 9 hours and 30 minutes ahead of Greenwich Mean Time (GMT).

Countries using this time zone: Australia

Principal Cities: The largest city in the ACST time zone is Adelaide in Australia, with about 1.469 million people. Other major cities in this time zone include Darwin, Palmerston, Alice Springs, Mount Gambier.

Map of the areas on Australian Central Standard Time (ACST)
ACST all year ACST part of the year

Today the lighter areas are on UTC+10:30 (ACDT).

Open the world time zone map© OpenStreetMap

Daylight Saving: This is a standard time zone. During summer, some places set clocks forward one hour for daylight saving time and observe Australian Central Daylight Time (ACDT).

123456789101112End: Australian Central Standard Time (ACST) ended 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 local daylight time instead. Standard time ends annually on the first Sunday of October.

123456789101112Start: Australian Central Standard Time (ACST) starts 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. Standard time starts annually on the first Sunday of April.

See Australia daylight saving time and upcoming clock changes worldwide.

ACST representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +0930 - basic
  • +09:30 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +0930 - sign character (+) followed by a four digit time providing hours (09) and minutes (30) of the offset. Indicates an offset of nine hours and thirty minutes to the east of the zero meridian.
IANA/Olson: Reflects ACST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Australia/Adelaide
  • Australia/Broken_Hill
  • Australia/Darwin
  • Australia/North
  • Australia/South
  • Australia/Yancowinna

London Time Zone and Facts

Time Zone

Abbreviation / Offset
GMT – Greenwich Mean Time, UTC+0 (now)
BST – British Summer Time, UTC+1 (daylight saving time)
Daylight Saving Time Starts
123456789101112Sunday, March 28, 2027 at 1:00 amSunday, March 28, 2027 at 01:00: clocks go forward 1 hour to 2:00 am02:00 (BST). DST starts on the last Sunday of March each year. Also called Spring Forward or Summer Time.
Daylight Saving Time Ends
123456789101112Sunday, October 31, 2027 at 2:00 amSunday, October 31, 2027 at 02:00: clocks go back 1 hour to 1:00 am01:00 (GMT). DST ends on the last Sunday of October each year. Also called Fall Back or Winter Time.
Clock Changes
United Kingdom daylight saving time · Clock changes worldwide

London Facts

Country
United Kingdom
Alternative Names
ILondon, LON, Lakana, Landan, Landen, Ljondan, Llundain, Lodoni, Londain, Londan, Londar, Londe, Londen, Londin, Londinium, Londino, Londn, London, London osh, Londona, Londonas, Londoni, Londono, Londons, Londonu, Londra, Londres, Londrez, Londri, Londro, Londye, Londyn, Londýn, Lonn, Lontoo, Loundres, Luan GJon, Lun-tun, Lunden, Lundra, Lundun, Lundunir, Lundúnir, Lung-dung, Lunnainn, Lunnin, Lunnon, Luân Đôn, Lùn-tûn, Lùng-dŭng, Lûn-tun, Lākana, Lůndůn, Lọndọnu, Ranana, Rānana, ilantan, ladana, landan, landana, leondeon, lndn, london, londoni, lun dui, lun dun, lwndwn, lxndxn, rondon, Łondra, Λονδίνο, Лондан, Лондон, Лондон ош, Лондонъ, Лёндан, Լոնդոն, לאנדאן, לונדון, لأندأن, لندن, لوندون, لەندەن, ܠܘܢܕܘܢ, लंडन, लंदन, लण्डन, लन्डन्, लन्दन, লন্ডন, ਲੰਡਨ, લંડન, ଲଣ୍ଡନ, இலண்டன், లండన్, ಲಂಡನ್, ലണ്ടൻ, ලන්ඩන්, ลอนดอน, ລອນດອນ, ལོན་ཊོན།, လန်ဒန်မြို့, ლონდონი, ለንደን, ᎫᎴ ᏗᏍᎪᏂᎯᏱ, ロンドン, 伦敦, 倫敦, 런던
Population
8,961,989
Currency
Pound (GBP)
Geographic Coordinates
51° 30' N Latitude / 0° 07' W Longitude
International Dialing Code
+44
More About London
London time now
Current Time in the United Kingdom
UK time now

Bangkok Time Zone and Facts

Time Zone

Abbreviation / Offset
ICT – Indochina Time, UTC+7 (no daylight saving time)

Bangkok Facts

Country
Thailand
Alternative Names
Amphoe Phra Nakhon, BKK, Ban'nkok, Bancac, Bancocum, Bancoque, Bancác, Banghok, Bangkok, Bangkok Metropolis, Bangkoka, Bangkòk, Banguecoque, Bankok, Bankokas, Bankoko, Banqkok, Changwat Phra Nakhon, Krung Thep, Krung Thep Maha Nakhon, Krung Thep Maha Nakhon Amon Rattanakosin Mahintarayutthaya Maha Dilok Phop Noppharat Ratchathani Buri Rom Udom Ratchaniwet Maha Sathan Amon Phiman Awatan Sathit Sakka Thattiya Witsanukam Prasit, Krungdeb, Man-kuk, Màn-kuk, Phra Nakhon, Siayuthia, The City of Angels, bainkaka, bainkoka, bamkoka, bangkog, bangkwk, bankeakk, bankoku, bankwk, bngqwq, bnkak, byankak, byankaka, camraata byankaka, krungtheph, krungthephmhankhr, krungtheph‡, man gu, penkak, Μπανγκόκ, Бангкок, Банкок, Баҥкок, Բանգկոկ, באנגקאק, בנגקוק, بانكوك, بانکوک, بانکۆک, بانګکوک, بانگكوك, بنکاک, बँकॉक, बैंकक, बैंकॉक, চাংৱাত ব্যাংকক, ব্যাংকক, ਬੈਂਕਾਕ, பேங்காக், ಬ್ಯಾಂಕಾಕ್, ബാങ്കോക്ക്, බැංකොක්, กรุงเทพ, กรุงเทพมหานคร, กรุงเทพฯ, ບາງກອກ, པན་ཀོག, ဘန်ကောက်မြို့, ბანგკოკი, ባንኮክ, バンコク, 曼谷, 방콕
Population
5,104,476
Currency
Baht (THB)
Geographic Coordinates
13° 45' N Latitude / 100° 30' E Longitude
International Dialing Code
+66
More About Bangkok
Bangkok local time and city facts