Chicago to London to Tokyo to Sydney Time Converter

Updating current time…
Chicago
Illinois, USACST
UTC−6
12am
3am
6am
9am
12pm
3pm
6pm
9pm
London
United KingdomGMT
UTC+0
6h ahead
12am
3am
6am
9am
12pm
3pm
6pm
9pm
Tokyo
JapanJST
UTC+9
15h ahead
12am
3am
6am
9am
12pm
3pm
6pm
9pm
Sydney
AustraliaAEDT
UTC+11
17h ahead
12am
3am
6am
9am
12pm
3pm
6pm
9pm

Quick answers

Selected conversion

6:00 am06:00 CST (UTC-6), Nov 3, 2026 = 12:00 pm12:00 GMT (UTC+0), Nov 3, 2026 = 9:00 pm21:00 JST (UTC+9), Nov 3, 2026 = 11:00 pm23:00 AEDT (UTC+11), Nov 3, 2026

Chicago is 6 hours behind London. Chicago is 15 hours behind Tokyo. Chicago is 17 hours behind Sydney.

How the time difference changes

Chicago to London

For most of the year, Chicago is 6 hours behind London. From Mar 14 to Mar 28, 2027, and from Oct 31 to Nov 7, 2027, Chicago is 5 hours behind London.

For most of the year, working hours of 9:00 am to 6:00 pm in Chicago correspond to 3:00 pm to 12:00 am (next day) in London. At other times of the year, working hours of 9:00 am to 6:00 pm in Chicago correspond to 2:00 pm to 11:00 pm in London.For most of the year, working hours of 09:00 to 18:00 in Chicago correspond to 15:00 to 00:00 (next day) in London. At other times of the year, working hours of 09:00 to 18:00 in Chicago correspond to 14:00 to 23:00 in London.

Chicago to Tokyo

For most of the year, Chicago is 14 hours behind Tokyo. From Nov 1, 2026 to Mar 14, 2027, Chicago is 15 hours behind Tokyo.

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

Chicago to Sydney

Depending on seasonal clock changes, Chicago is 15 hours behind Sydney, Chicago is 16 hours behind Sydney, or Chicago is 17 hours behind Sydney.

Depending on seasonal clock changes, working hours of 9:00 am to 6:00 pm in Chicago correspond to 12:00 am (next day) to 9:00 am (next day) in Sydney, working hours of 9:00 am to 6:00 pm in Chicago correspond to 1:00 am (next day) to 10:00 am (next day) in Sydney, or working hours of 9:00 am to 6:00 pm in Chicago correspond to 2:00 am (next day) to 11:00 am (next day) in Sydney.Depending on seasonal clock changes, working hours of 09:00 to 18:00 in Chicago correspond to 00:00 (next day) to 09:00 (next day) in Sydney, working hours of 09:00 to 18:00 in Chicago correspond to 01:00 (next day) to 10:00 (next day) in Sydney, or working hours of 09:00 to 18:00 in Chicago correspond to 02:00 (next day) to 11:00 (next day) in Sydney.

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

Time Difference

CST (Central Standard Time) is 6 hours behind GMT (Greenwich Mean Time). CST (Central Standard Time) is 15 hours behind JST (Japan Standard Time). CST (Central Standard Time) is 17 hours behind AEDT (Australian Eastern Daylight Time).
6:00 am06:00 in Chicago, IL, USA is 12:00 pm12:00 in London, United Kingdom and is 9:00 pm21:00 in Tokyo, Japan and is 11:00 pm23:00 in Sydney, Australia

Chicago to London call time
Best time for a conference call or a meeting is between 9am-12pm09:00-12:00 in Chicago which corresponds to 3pm-6pm15:00-18:00 in London
Chicago to Tokyo call time
Best time for a conference call or a meeting is between 5:30pm-6:30pm17:30-18:30 in Chicago which corresponds to 8:30am-9:30am08:30-09:30 in Tokyo (next day). Their 9am–6pm09:00–18:00 working hours do not overlap; this is a suggested compromise.
Chicago to Sydney call time
Best time for a conference call or a meeting is between 4pm-6pm16:00-18:00 in Chicago which corresponds to 9am-11am09:00-11:00 in Sydney (next day)

6:00 am06:00 CST (Central Standard Time) (Chicago, IL, USA). Offset UTC -6:00 hours
12:00 pm12:00 GMT (Greenwich Mean Time) (London, United Kingdom). Offset UTC 0:00 hours
9:00 pm21:00 JST (Japan Standard Time) (Tokyo, Japan). Offset UTC +9:00 hours
11:00 pm23:00 AEDT (Australian Eastern Daylight Time) (Sydney, Australia). Offset UTC +11:00 hours

6:00 am06:00 Chicago, IL, USA / 12:00 pm12:00 London, United Kingdom / 9:00 pm21:00 Tokyo, Japan / 11:00 pm23:00 Sydney, Australia

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
Chicago, IL, USALondon, United KingdomTokyo, JapanSydney, Australia
6:00am3:00pm5:00pm
7:00am4:00pm6:00pm
8:00am5:00pm7:00pm
9:00am6:00pm8:00pm
10:00am7:00pm9:00pm
11:00am8:00pm10:00pm
12:00pm9:00pm11:00pm
1:00pm10:00pm12:00am next day
2:00pm11:00pm1:00am next day
3:00pm12:00am next day2:00am next day
4:00pm1:00am next day3:00am next day
5:00pm2:00am next day4:00am next day
6:00pm3:00am next day5:00am next day
7:00pm4:00am next day6:00am next day
8:00pm5:00am next day7:00am next day
9:00pm6:00am next day8:00am next day
10:00pm7:00am next day9:00am next day
11:00pm8:00am next day10:00am next day
12:00am next day9:00am next day11:00am next day
1:00am next day10:00am next day12:00pm next day
2:00am next day11:00am next day1:00pm next day
3:00am next day12:00pm next day2:00pm next day
4:00am next day1:00pm next day3:00pm next day
5:00am next day2:00pm next day4:00pm next day
06:0015:0017:00
07:0016:0018:00
08:0017:0019:00
09:0018:0020:00
10:0019:0021:00
11:0020:0022:00
12:0021:0023:00
13:0022:0000:00 next day
14:0023:0001:00 next day
15:0000:00 next day02:00 next day
16:0001:00 next day03:00 next day
17:0002:00 next day04:00 next day
18:0003:00 next day05:00 next day
19:0004:00 next day06:00 next day
20:0005:00 next day07:00 next day
21:0006:00 next day08:00 next day
22:0007:00 next day09:00 next day
23:0008:00 next day10:00 next day
00:00 next day09:00 next day11:00 next day
01:00 next day10:00 next day12:00 next day
02:00 next day11:00 next day13:00 next day
03:00 next day12:00 next day14:00 next day
04:00 next day13:00 next day15:00 next day
05:00 next day14:00 next day16:00 next day

Chicago Time Zone and Facts

Time Zone

Abbreviation / Offset
CST – Central Standard Time, UTC-6 (now)
CDT – Central Daylight Time, UTC-5 (daylight saving time)
Daylight Saving Time Starts
123456789101112Sunday, March 14, 2027 at 2:00 amSunday, March 14, 2027 at 02:00: clocks go forward 1 hour to 3:00 am03:00 (CDT). DST starts on the 2nd Sunday of March each year. Also called Spring Forward or Summer Time.
Daylight Saving Time Ends
123456789101112Sunday, November 7, 2027 at 2:00 amSunday, November 7, 2027 at 02:00: clocks go back 1 hour to 1:00 am01:00 (CST). DST ends on the 1st Sunday of November each year. Also called Fall Back or Winter Time.
Clock Changes
USA daylight saving time · Clock changes worldwide

Chicago Facts

Country
USA
State
Illinois
Alternative Names
CHI, Cekaga, Chi-ka-ko, Chi-kâ-kô, Chicago, Chicagu, Chikago, Chykaga, Cikaga, Cikago, Cikaqo, E-Chicago, Kikako, Shikago, Sicagum, Sikago, The Windy City, Tsikago, Windy City, chikhako, cikago, cikako, shikago, shkagw, shykaghw, shykagw, shykajw, shyqgw, sikago, sikkagea, syqgw, zhi jia ge, Çikago, Çikaqo, Ĉikago, Čikaga, Čikago, Čikāga, Čėkaga, Şikago, Σικάγο, Чикаго, Чикаґо, Чыкага, Չիկագո, שיקאגא, שיקגו, شيكاجو, شيكاغو, شکاگو, شیکاگو, شیکاگۆ, ܫܝܩܓܘ, शिकागो, শিকাগো, ਸ਼ਿਕਾਗੋ, சிகாகோ, చికాగో, ಶಿಕಾಗೊ, ഷിക്കാഗോ, ชิคาโก, ရှီကာဂိုမြို့, ჩიკაგო, ሺካጎ, ᓰᖄᑯ, Ṣìkágò, シカゴ, 芝加哥, 시카고, 𐍃𐌾𐌹𐌺𐌰𐌲𐍉
Population
2,664,452
Currency
Dollar (USD)
Geographic Coordinates
41° 51' N Latitude / 87° 39' W Longitude
International Dialing Code
+1
More About Chicago
Chicago time now

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

Tokyo Time Zone and Facts

Time Zone

Abbreviation / Offset
JST – Japan Standard Time, UTC+9 (no daylight saving time)

Tokyo Facts

Country
Japan
Alternative Names
Edo, TYO, Tochiu, Tocio, Tokija, Tokijas, Tokio, Tokió, Tokjo, Tokyo, Toquio, Toquio - dong jing, Toquio - 東京, Tòquio, Tókýó, Tóquio, Tōkyō, dokyo, dong jing, dong jing dou, dong-gyeong, tokeiyw, toki'o, tokkiyo, tokyo, twkyw, twqyw, Τόκιο, Токио, Токё, Токіо, Տոկիո, טוקיו, توكيو, توکیو, طوكيو, ܛܘܟܝܘ, ܜܘܟܝܘ, टोक्यो, টোকিও, டோக்கியோ, โตเกียว, ტოკიო, 东京, 東京, 東京都, 도쿄, 동경
Population
9,733,276
Currency
Yen (JPY)
Geographic Coordinates
35° 41' N Latitude / 139° 41' E Longitude
International Dialing Code
+81
More About Tokyo
Tokyo time now
Current Time in Japan
Japan time now

Sydney Time Zone and Facts

Time Zone

Abbreviation / Offset
AEDT – Australian Eastern Daylight Time, UTC+11 (now, daylight saving time)
AEST – Australian Eastern Standard Time, UTC+10 (standard time)
Daylight Saving Time Ends
123456789101112Sunday, April 4, 2027 at 3:00 amSunday, April 4, 2027 at 03:00: clocks go back 1 hour to 2:00 am02:00 (AEST). DST ends on the 1st Sunday of April each year. Also called Fall Back or Winter Time.
Daylight Saving Time Starts
123456789101112Sunday, October 3, 2027 at 2:00 amSunday, October 3, 2027 at 02:00: clocks go forward 1 hour to 3:00 am03:00 (AEDT). DST starts on the 1st Sunday of October each year. Also called Spring Forward or Summer Time.
Clock Changes
Australia daylight saving time · Clock changes worldwide

Sydney Facts

Country
Australia
Alternative Names
SYD, Sanctus Dionysius, Sedniejos, Sek-na, Sidnef, Sidnei, Sidnej, Sidneja, Sidnejo, Sidnejus, Sidney, Sidneý, Sidni, Sidnéy, Sidnėjus, Sit-ni, Sit-nì, Syd, Sydneium, Sydney, Sydney City, Sék-nà̤, Sídney, Sîdney, Sėdniejos, citni, shidoni, sidani, sideuni, sidnei, sidni, sidniy, sydny, xi ni, xue li, Σίδνεϋ, Сиднеи, Сидней, Сиднеј, Сидни, Сідней, Сідні, Սիդնեյ, סידני, سيدنى, سيدني, سڈنی, سیدنی, ܣܝܕܢܝ, सिडनी, सिड्नी, सिद्नी, সিডনি, ਸਿਡਨੀ, સીડની, சிட்னி, సిడ్నీ, ಸಿಡ್ನಿ, സിഡ്നി, සිඩ්නි, ซิดนีย์, སིད་ནེ།, ဆစ်ဒနီမြို့, სიდნეი, ሲድኒ, ស៊ីដនីយ៏, シドニー, 悉尼, 雪梨, 시드니
Population
5,638,830
Currency
Dollar (AUD)
Geographic Coordinates
33° 52' S Latitude / 151° 12' E Longitude
International Dialing Code
+61
More About Sydney
Sydney time now