EST to London to KST to Seoul to JST to GMT to HKT Time Converter

Updating current time…
EST
Eastern Standard Time
UTC−5
12am
3am
6am
9am
12pm
3pm
6pm
9pm
London
United KingdomGMT
UTC+0
5h ahead
12am
3am
6am
9am
12pm
3pm
6pm
9pm
KST
Korea Standard Time
UTC+9
14h ahead
12am
3am
6am
9am
12pm
3pm
6pm
9pm
Seoul
South KoreaKST
UTC+9
14h ahead
12am
3am
6am
9am
12pm
3pm
6pm
9pm
JST
Japan Standard Time
UTC+9
14h ahead
12am
3am
6am
9am
12pm
3pm
6pm
9pm
GMT
Greenwich Mean Time
UTC+0
5h ahead
12am
3am
6am
9am
12pm
3pm
6pm
9pm
HKT
Hong Kong Time
UTC+8
13h ahead
12am
3am
6am
9am
12pm
3pm
6pm
9pm

Quick answers

Selected conversion

7:00 am07:00 EST (UTC-5), Nov 11, 2026 = 12:00 pm12:00 GMT (UTC+0), Nov 11, 2026 = 9:00 pm21:00 KST (UTC+9), Nov 11, 2026 = 9:00 pm21:00 KST (UTC+9), Nov 11, 2026 = 9:00 pm21:00 JST (UTC+9), Nov 11, 2026 = 12:00 pm12:00 GMT (UTC+0), Nov 11, 2026 = 8:00 pm20:00 HKT (UTC+8), Nov 11, 2026

EST is 5 hours behind London. EST is 14 hours behind KST. EST is 14 hours behind Seoul. EST is 14 hours behind JST. EST is 5 hours behind GMT. EST is 13 hours behind HKT.

How the time difference changes

EST to London

For most of the year, EDT is 5 hours behind London. From Nov 1, 2026 to Mar 14, 2027, and from Nov 7, 2027 to Mar 12, 2028, EST is 5 hours behind London. From Mar 14 to Mar 28, 2027, and from Oct 31 to Nov 7, 2027, EDT is 4 hours behind London.

For most of the year, working hours of 9:00 am to 6:00 pm in EDT correspond to 2:00 pm to 11:00 pm in London. At other times of the year, working hours of 9:00 am to 6:00 pm in EST correspond to 2:00 pm to 11:00 pm in London or working hours of 9:00 am to 6:00 pm in EDT correspond to 1:00 pm to 10:00 pm in London.For most of the year, working hours of 09:00 to 18:00 in EDT correspond to 14:00 to 23:00 in London. At other times of the year, working hours of 09:00 to 18:00 in EST correspond to 14:00 to 23:00 in London or working hours of 09:00 to 18:00 in EDT correspond to 13:00 to 22:00 in London.

EST to KST

For most of the year, EDT is 13 hours behind KST. From Nov 1, 2026 to Mar 14, 2027, and from Nov 7, 2027 to Mar 12, 2028, EST is 14 hours behind KST.

For most of the year, working hours of 9:00 am to 6:00 pm in EDT correspond to 10:00 pm to 7:00 am (next day) in KST. At other times of the year, working hours of 9:00 am to 6:00 pm in EST correspond to 11:00 pm to 8:00 am (next day) in KST.For most of the year, working hours of 09:00 to 18:00 in EDT correspond to 22:00 to 07:00 (next day) in KST. At other times of the year, working hours of 09:00 to 18:00 in EST correspond to 23:00 to 08:00 (next day) in KST.

EST to Seoul

For most of the year, EDT is 13 hours behind Seoul. From Nov 1, 2026 to Mar 14, 2027, and from Nov 7, 2027 to Mar 12, 2028, EST is 14 hours behind Seoul.

For most of the year, working hours of 9:00 am to 6:00 pm in EDT correspond to 10:00 pm to 7:00 am (next day) in Seoul. At other times of the year, working hours of 9:00 am to 6:00 pm in EST correspond to 11:00 pm to 8:00 am (next day) in Seoul.For most of the year, working hours of 09:00 to 18:00 in EDT correspond to 22:00 to 07:00 (next day) in Seoul. At other times of the year, working hours of 09:00 to 18:00 in EST correspond to 23:00 to 08:00 (next day) in Seoul.

EST to JST

For most of the year, EDT is 13 hours behind JST. From Nov 1, 2026 to Mar 14, 2027, and from Nov 7, 2027 to Mar 12, 2028, EST is 14 hours behind JST.

For most of the year, working hours of 9:00 am to 6:00 pm in EDT correspond to 10:00 pm to 7:00 am (next day) in JST. At other times of the year, working hours of 9:00 am to 6:00 pm in EST correspond to 11:00 pm to 8:00 am (next day) in JST.For most of the year, working hours of 09:00 to 18:00 in EDT correspond to 22:00 to 07:00 (next day) in JST. At other times of the year, working hours of 09:00 to 18:00 in EST correspond to 23:00 to 08:00 (next day) in JST.

EST to GMT

For most of the year, EDT is 4 hours behind GMT. From Nov 1, 2026 to Mar 14, 2027, and from Nov 7, 2027 to Mar 12, 2028, EST is 5 hours behind GMT.

For most of the year, working hours of 9:00 am to 6:00 pm in EDT correspond to 1:00 pm to 10:00 pm in GMT. At other times of the year, working hours of 9:00 am to 6:00 pm in EST correspond to 2:00 pm to 11:00 pm in GMT.For most of the year, working hours of 09:00 to 18:00 in EDT correspond to 13:00 to 22:00 in GMT. At other times of the year, working hours of 09:00 to 18:00 in EST correspond to 14:00 to 23:00 in GMT.

EST to HKT

For most of the year, EDT is 12 hours behind HKT. From Nov 1, 2026 to Mar 14, 2027, and from Nov 7, 2027 to Mar 12, 2028, EST is 13 hours behind HKT.

For most of the year, working hours of 9:00 am to 6:00 pm in EDT correspond to 9:00 pm to 6:00 am (next day) in HKT. At other times of the year, working hours of 9:00 am to 6:00 pm in EST correspond to 10:00 pm to 7:00 am (next day) in HKT.For most of the year, working hours of 09:00 to 18:00 in EDT correspond to 21:00 to 06:00 (next day) in HKT. At other times of the year, working hours of 09:00 to 18:00 in EST correspond to 22:00 to 07:00 (next day) in HKT.

Compare EST time with London, KST, Seoul, JST, GMT, and HKT time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.

Time Difference

Eastern Standard Time is 5 hours behind GMT (Greenwich Mean Time). Eastern Standard Time is 14 hours behind Korea Standard Time. Eastern Standard Time is 14 hours behind KST (Korea Standard Time). Eastern Standard Time is 14 hours behind Japan Standard Time. Eastern Standard Time is 5 hours behind Greenwich Mean Time. Eastern Standard Time is 13 hours behind Hong Kong Time.
7:00 am07:00 in EST is 12:00 pm12:00 in London, United Kingdom and is 9:00 pm21:00 in KST and is 9:00 pm21:00 in Seoul, South Korea and is 9:00 pm21:00 in JST and is 12:00 pm12:00 in GMT and is 8:00 pm20:00 in HKT

EST to London call time
Best time for a conference call or a meeting is between 9am-1pm09:00-13:00 in EST which corresponds to 2pm-6pm14:00-18:00 in London.
EST to KST call time
Best time for a conference call or a meeting is between 6pm-7pm18:00-19:00 in EST which corresponds to 8am-9am08:00-09:00 in KST (next day). Their 9am–6pm09:00–18:00 working hours do not overlap; this is a suggested compromise.
EST to Seoul call time
Best time for a conference call or a meeting is between 6pm-7pm18:00-19:00 in EST which corresponds to 8am-9am08:00-09:00 in Seoul (next day). Their 9am–6pm09:00–18:00 working hours do not overlap; this is a suggested compromise.
EST to JST call time
Best time for a conference call or a meeting is between 6pm-7pm18:00-19:00 in EST which corresponds to 8am-9am08:00-09:00 in JST (next day). Their 9am–6pm09:00–18:00 working hours do not overlap; this is a suggested compromise.
EST to GMT call time
Best time for a conference call or a meeting is between 9am-1pm09:00-13:00 in EST which corresponds to 2pm-6pm14:00-18:00 in GMT.
EST to HKT call time
Best time for a conference call or a meeting is between 6:30pm-7:30pm18:30-19:30 in EST which corresponds to 7:30am-8:30am07:30-08:30 in HKT (next day). Their 9am–6pm09:00–18:00 working hours do not overlap; this is a suggested compromise.

7:00 am07:00 Eastern Standard Time (EST). Offset UTC -5:00 hours
12:00 pm12:00 GMT (Greenwich Mean Time) (London, United Kingdom). Offset UTC 0:00 hours
9:00 pm21:00 Korea Standard Time (KST). Offset UTC +9:00 hours
9:00 pm21:00 KST (Korea Standard Time) (Seoul, South Korea). Offset UTC +9:00 hours
9:00 pm21:00 Japan Standard Time (JST). Offset UTC +9:00 hours
12:00 pm12:00 Greenwich Mean Time (GMT). Offset UTC 0:00 hours
8:00 pm20:00 Hong Kong Time (HKT). Offset UTC +8:00 hours

7:00 am07:00 EST / 12:00 pm12:00 London, United Kingdom / 9:00 pm21:00 KST / 9:00 pm21:00 Seoul, South Korea / 9:00 pm21:00 JST / 12:00 pm12:00 GMT / 8:00 pm20:00 HKT

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
ESTLondon, United KingdomKSTSeoul, South KoreaJSTGMTHKT
5:00am2:00pm2:00pm2:00pm5:00am1:00pm
6:00am3:00pm3:00pm3:00pm6:00am2:00pm
7:00am4:00pm4:00pm4:00pm7:00am3:00pm
8:00am5:00pm5:00pm5:00pm8:00am4:00pm
9:00am6:00pm6:00pm6:00pm9:00am5:00pm
10:00am7:00pm7:00pm7:00pm10:00am6:00pm
11:00am8:00pm8:00pm8:00pm11:00am7:00pm
12:00pm9:00pm9:00pm9:00pm12:00pm8:00pm
1:00pm10:00pm10:00pm10:00pm1:00pm9:00pm
2:00pm11:00pm11:00pm11:00pm2:00pm10:00pm
3:00pm12:00am next day12:00am next day12:00am next day3:00pm11:00pm
4:00pm1:00am next day1:00am next day1:00am next day4:00pm12:00am next day
5:00pm2:00am next day2:00am next day2:00am next day5:00pm1:00am next day
6:00pm3:00am next day3:00am next day3:00am next day6:00pm2:00am next day
7:00pm4:00am next day4:00am next day4:00am next day7:00pm3:00am next day
8:00pm5:00am next day5:00am next day5:00am next day8:00pm4:00am next day
9:00pm6:00am next day6:00am next day6:00am next day9:00pm5:00am next day
10:00pm7:00am next day7:00am next day7:00am next day10:00pm6:00am next day
11:00pm8:00am next day8:00am next day8:00am next day11:00pm7:00am next day
12:00am next day9:00am next day9:00am next day9:00am next day12:00am next day8:00am next day
1:00am next day10:00am next day10:00am next day10:00am next day1:00am next day9:00am next day
2:00am next day11:00am next day11:00am next day11:00am next day2:00am next day10:00am next day
3:00am next day12:00pm next day12:00pm next day12:00pm next day3:00am next day11:00am next day
4:00am next day1:00pm next day1:00pm next day1:00pm next day4:00am next day12:00pm next day
05:0014:0014:0014:0005:0013:00
06:0015:0015:0015:0006:0014:00
07:0016:0016:0016:0007:0015:00
08:0017:0017:0017:0008:0016:00
09:0018:0018:0018:0009:0017:00
10:0019:0019:0019:0010:0018:00
11:0020:0020:0020:0011:0019:00
12:0021:0021:0021:0012:0020:00
13:0022:0022:0022:0013:0021:00
14:0023:0023:0023:0014:0022:00
15:0000:00 next day00:00 next day00:00 next day15:0023:00
16:0001:00 next day01:00 next day01:00 next day16:0000:00 next day
17:0002:00 next day02:00 next day02:00 next day17:0001:00 next day
18:0003:00 next day03:00 next day03:00 next day18:0002:00 next day
19:0004:00 next day04:00 next day04:00 next day19:0003:00 next day
20:0005:00 next day05:00 next day05:00 next day20:0004:00 next day
21:0006:00 next day06:00 next day06:00 next day21:0005:00 next day
22:0007:00 next day07:00 next day07:00 next day22:0006:00 next day
23:0008:00 next day08:00 next day08:00 next day23:0007:00 next day
00:00 next day09:00 next day09:00 next day09:00 next day00:00 next day08:00 next day
01:00 next day10:00 next day10:00 next day10:00 next day01:00 next day09:00 next day
02:00 next day11:00 next day11:00 next day11:00 next day02:00 next day10:00 next day
03:00 next day12:00 next day12:00 next day12:00 next day03:00 next day11:00 next day
04:00 next day13:00 next day13:00 next day13:00 next day04:00 next day12:00 next day

Eastern Standard Time

Offset: EST is 5 hours behind Greenwich Mean Time (GMT).

Countries using this time zone: Bahamas, Canada, Cayman Islands, Haiti, Jamaica, Mexico, Panama, Turks and Caicos Islands, United States

Principal Cities: The largest city in the EST time zone is New York City in the United States, with about 8.804 million people. Other major cities in this time zone include Toronto, Montréal, Philadelphia, Port-au-Prince.

French: HNE - Heure Normale de l'Est

Spanish: ET - Tiempo del Este, ET - Zona Sureste

Map of the areas on Eastern Standard Time (EST)
EST all year EST part of the year

Today all shaded areas are on EST.

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 Eastern Daylight Time (EDT).

123456789101112Start: Eastern Standard Time (EST) started on Sunday, November 1, 2026 at 2:00 am02:00 local time and clocks were set one hour back to Sunday, November 1, 2026, 1:00 am01:00. Standard time starts annually on the first Sunday of November.

123456789101112End: Eastern Standard Time (EST) ends on Sunday, March 14, 2027 at 2:00 am02:00 local time and clocks are set one hour forward to Sunday, March 14, 2027, 3:00 am03:00 local daylight time instead. Standard time ends annually on the second Sunday of March.

See USA daylight saving time and upcoming clock changes worldwide.

EST representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • -05 - basic short
  • -0500 - basic
  • -05:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • -0500 - sign character (-) followed by a four digit time providing hours (05) and minutes (00) of the offset. Indicates an offset of five hours to the west of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Romeo - Military abbreviation for EST
  • R - short form of 'Romeo'
IANA/Olson: Reflects EST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • America/Atikokan
  • America/Cancun
  • America/Cayman
  • America/Coral_Harbour
  • America/Detroit
  • America/Fort_Wayne
  • America/Grand_Turk
  • America/Indiana/Indianapolis
  • America/Indiana/Marengo
  • America/Indiana/Petersburg
  • America/Indiana/Vevay
  • America/Indiana/Vincennes
  • America/Indiana/Winamac
  • America/Indianapolis
  • America/Iqaluit
  • America/Jamaica
  • America/Kentucky/Louisville
  • America/Kentucky/Monticello
  • America/Louisville
  • America/Montreal
  • America/Nassau
  • America/New_York
  • America/Nipigon
  • America/Panama
  • America/Pangnirtung
  • America/Port-au-Prince
  • America/Thunder_Bay
  • America/Toronto
  • Canada/Eastern
  • EST
  • EST5EDT
  • Jamaica
  • US/East-Indiana
  • US/Eastern
  • US/Michigan
Time zones with the GMT -5 offset:
  • CDT - Central Daylight Time
  • EST - Eastern Standard Time
  • ET - Eastern Time
  • COT - Colombia Time
  • CST - Cuba Standard Time
  • EASST - Easter Island Summer Time
  • ECT - Ecuador Time
  • PET - Peru Time
  • R - Romeo Time Zone

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

Korea Standard Time

Offset: KST is 9 hours ahead of Greenwich Mean Time (GMT).

Countries using this time zone: North Korea, South Korea

Principal Cities: The largest city in the KST time zone is Seoul in South Korea, with about 10.349 million people. Other major cities in this time zone include Busan, Pyongyang, Incheon, Daegu.

Daylight Saving: Clocks in Korea Standard Time (KST) do not change for daylight saving time, so KST stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter; see upcoming clock changes worldwide.

Map of the areas on Korea Standard Time (KST)
KST all year

Open the world time zone map© OpenStreetMap

KST representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +09 - basic short
  • +0900 - basic
  • +09:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +0900 - sign character (+) followed by a four digit time providing hours (09) and minutes (00) of the offset. Indicates an offset of nine hours to the east of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • India - Military abbreviation for KST
  • I - short form of 'India'
IANA/Olson: Reflects KST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Asia/Pyongyang
  • Asia/Seoul
  • ROK
KST Abbreviation: Several time zones share KST abbreviation and it could refer to these time zones
  • Korea Standard Time - UTC +9
  • Pyongyang Time - UTC +8:30
Time zones with the GMT +9 offset:
  • AWDT - Australian Western Daylight Time
  • CHOST - Choibalsan Summer Time
  • I - India Time Zone
  • IRKST - Irkutsk Summer Time
  • JST - Japan Standard Time
  • KST - Korea Standard Time
  • PWT - Palau Time
  • TLT - East Timor Time
  • ULAST - Ulaanbaatar Summer Time
  • WIT - Eastern Indonesian Time
  • YAKT - Yakutsk Time

Seoul Time Zone and Facts

Time Zone

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

Seoul Facts

Country
South Korea
Alternative Names
Hanyang, SEL, Seoel, Seol, Seoul, Seoul-si, Seuel, Seul, Seula, Seulas, Seulo, Seulum, Seúl, Seül, Siul, Soeul, Sol, Soul, Sye-ul, Syou-ouen, Szoeul, Szöul, Séoul, Sêûl, Söul, Sŏul, Wang-ching, Wo-jo, Wō-jō, ciyol, han-yang, saul, seoul, seoulsi, seoulteugbyeolsi, seuli, shou er, shou er te bie shi, si'ula, siyola, sol, sola, souru, souru te bie shi, sywl, Σεούλ, Сеул, Соул, Сөүл, Սեուլ, סאול, סיאול, סעאל, سئول, سيول, سیول, سێئول, سېئول, सियोल, सोल, সিউল, சியோல், ಸೌಲ್, സോൾ, โซล, སེ་ཨུལ།, ဆိုးလ်မြို့, სეული, ሶል, សេអ៊ូល, ソウル, ソウル特別市, 首尔, 首尔特别市, 서울, 서울시, 서울특별시, 한양
Population
10,349,312
Currency
Won (KRW)
Geographic Coordinates
37° 33' N Latitude / 126° 58' E Longitude
International Dialing Code
+82
More About Seoul
Seoul local time and city facts

Japan Standard Time

Offset: JST is 9 hours ahead of Greenwich Mean Time (GMT).

Countries using this time zone: Japan

Principal Cities: The largest city in the JST time zone is Tokyo in Japan, with about 9.733 million people. Other major cities in this time zone include Yokohama, Osaka, Nagoya, Sapporo.

Daylight Saving: Clocks in Japan Standard Time (JST) do not change for daylight saving time, so JST stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter; see upcoming clock changes worldwide.

Current time in Japan: Japan time now

Map of the areas on Japan Standard Time (JST)
JST all year

Open the world time zone map© OpenStreetMap

JST representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +09 - basic short
  • +0900 - basic
  • +09:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +0900 - sign character (+) followed by a four digit time providing hours (09) and minutes (00) of the offset. Indicates an offset of nine hours to the east of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • India - Military abbreviation for JST
  • I - short form of 'India'
IANA/Olson: Reflects JST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Asia/Tokyo
  • Japan
Time zones with the GMT +9 offset:
  • AWDT - Australian Western Daylight Time
  • CHOST - Choibalsan Summer Time
  • I - India Time Zone
  • IRKST - Irkutsk Summer Time
  • JST - Japan Standard Time
  • KST - Korea Standard Time
  • PWT - Palau Time
  • TLT - East Timor Time
  • ULAST - Ulaanbaatar Summer Time
  • WIT - Eastern Indonesian Time
  • YAKT - Yakutsk Time

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.

Map of the areas on Greenwich Mean Time (GMT)
GMT all year GMT part of the year

Today all shaded areas are on GMT.

Open the world time zone map© OpenStreetMap

GMT representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • Z - is the zone designator for the zero UTC/GMT offset, also known as 'Zulu' time
  • +00 - basic short
  • +0000 - basic
  • +00:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +0000 - sign character (+) followed by a four digit time providing hours (00) and minutes (00) of the offset. Indicates the zero UTC/GMT offset.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Zulu - Military abbreviation for GMT
  • Z - short form of 'Zulu'
IANA/Olson: Reflects GMT time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • 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
Time zones with the GMT +0 offset:
  • 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

Hong Kong Time

Offset: HKT is 8 hours ahead of Greenwich Mean Time (GMT).

Countries using this time zone: Hong Kong

Principal Cities: The largest city in the HKT time zone is Hong Kong in Hong Kong, with about 7.396 million people.

Daylight Saving: Clocks in Hong Kong Time (HKT) do not change for daylight saving time, so HKT stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter; see upcoming clock changes worldwide.

Map of the areas on Hong Kong Time (HKT)
HKT all year

Open the world time zone map© OpenStreetMap

HKT representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +08 - basic short
  • +0800 - basic
  • +08:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +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 east of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Hotel - Military abbreviation for HKT
  • H - short form of 'Hotel'
IANA/Olson: Reflects HKT time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Asia/Hong_Kong
  • Hongkong
Time zones with the GMT +8 offset:
  • ACT - ASEAN Common Time
  • AWST - Australian Western Standard Time
  • BNT - Brunei Darussalam Time
  • CAST - Casey Time
  • CHOT - Choibalsan Time
  • CST - China Standard Time
  • H - Hotel Time Zone
  • HKT - Hong Kong Time
  • HOVST - Hovd Summer Time
  • IRKT - Irkutsk Time
  • KRAST - Krasnoyarsk Summer Time
  • MYT - Malaysia Time
  • PHT - Philippine Time
  • SGT - Singapore Time
  • ULAT - Ulaanbaatar Time
  • WITA - Central Indonesian Time