PDT to GMT to London Time Converter

Updating current time…
PDT
Pacific Daylight Time
UTC−7
12am
3am
6am
9am
12pm
3pm
6pm
9pm
GMT
Greenwich Mean Time
UTC+0
7h ahead
12am
3am
6am
9am
12pm
3pm
6pm
9pm
The United Kingdom is on summer time: BST (UTC+1) until Sun, Oct 25.

Iceland and Ghana stay on GMT (UTC+0).

Iceland, Ghana · GMT all year (UTC+0)United Kingdom · BST (UTC+1)
London
United KingdomBST
UTC+1
8h ahead
12am
3am
6am
9am
12pm
3pm
6pm
9pm
London's clocks go back 1 hour on Sun, Oct 25 · BST → GMT

Quick answers

Selected conversion

5:00 am05:00 PDT (UTC-7), Oct 18, 2026 = 12:00 pm12:00 GMT (UTC+0), Oct 18, 2026 = 1:00 pm13:00 BST (UTC+1), Oct 18, 2026

PDT is 7 hours behind GMT. PDT is 8 hours behind London.

How the time difference changes

PDT to GMT

For most of the year, PDT is 7 hours behind GMT. From Nov 1, 2026 to Mar 14, 2027, PST is 8 hours behind GMT.

For most of the year, working hours of 9:00 am to 6:00 pm in PDT correspond to 4:00 pm to 1:00 am (next day) in GMT. At other times of the year, working hours of 9:00 am to 6:00 pm in PST correspond to 5:00 pm to 2:00 am (next day) in GMT.For most of the year, working hours of 09:00 to 18:00 in PDT correspond to 16:00 to 01:00 (next day) in GMT. At other times of the year, working hours of 09:00 to 18:00 in PST correspond to 17:00 to 02:00 (next day) in GMT.

PDT to London

For most of the year, PDT is 8 hours behind London. From Oct 25 to Nov 1, 2026, and from Mar 14 to Mar 28, 2027, PDT is 7 hours behind London. From Nov 1, 2026 to Mar 14, 2027, PST is 8 hours behind London.

For most of the year, working hours of 9:00 am to 6:00 pm in PDT correspond to 5:00 pm to 2:00 am (next day) in London. At other times of the year, working hours of 9:00 am to 6:00 pm in PST correspond to 5:00 pm to 2:00 am (next day) in London or working hours of 9:00 am to 6:00 pm in PDT correspond to 4:00 pm to 1:00 am (next day) in London.For most of the year, working hours of 09:00 to 18:00 in PDT correspond to 17:00 to 02:00 (next day) in London. At other times of the year, working hours of 09:00 to 18:00 in PST correspond to 17:00 to 02:00 (next day) in London or working hours of 09:00 to 18:00 in PDT correspond to 16:00 to 01:00 (next day) in London.

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

Time Difference

Pacific Daylight Time is 7 hours behind Greenwich Mean Time. Pacific Daylight Time is 8 hours behind BST (British Summer Time).
5:00 am05:00 in PDT is 12:00 pm12:00 in GMT and is 1:00 pm13:00 in London, United Kingdom

PDT to GMT call time
Best time for a conference call or a meeting is between 9am-11am09:00-11:00 in PDT which corresponds to 4pm-6pm16:00-18:00 in GMT
PDT to London call time
Best time for a conference call or a meeting is between 9am-10am09:00-10:00 in PDT which corresponds to 5pm-6pm17:00-18:00 in London

5:00 am05:00 Pacific Daylight Time (PDT). Offset UTC -7:00 hours
12:00 pm12:00 Greenwich Mean Time (GMT). Offset UTC 0:00 hours
1:00 pm13:00 BST (British Summer Time) (London, United Kingdom). Offset UTC +1:00 hour

5:00 am05:00 PDT / 12:00 pm12:00 GMT / 1:00 pm13:00 London, United Kingdom

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
PDTGMTLondon, United Kingdom
7:00am8:00am
8:00am9:00am
9:00am10:00am
10:00am11:00am
11:00am12:00pm
12:00pm1:00pm
1:00pm2:00pm
2:00pm3:00pm
3:00pm4:00pm
4:00pm5:00pm
5:00pm6:00pm
6:00pm7:00pm
7:00pm8:00pm
8:00pm9:00pm
9:00pm10:00pm
10:00pm11:00pm
11:00pm12:00am next day
12:00am next day1:00am next day
1:00am next day2:00am next day
2:00am next day3:00am next day
3:00am next day4:00am next day
4:00am next day5:00am next day
5:00am next day6:00am next day
6:00am next day7:00am next day
07:0008:00
08:0009:00
09:0010:00
10:0011:00
11:0012:00
12:0013:00
13:0014:00
14:0015:00
15:0016:00
16:0017:00
17:0018:00
18:0019:00
19:0020:00
20:0021:00
21:0022:00
22:0023:00
23:0000:00 next day
00:00 next day01:00 next day
01:00 next day02:00 next day
02:00 next day03:00 next day
03:00 next day04:00 next day
04:00 next day05:00 next day
05:00 next day06:00 next day
06:00 next day07:00 next day

Pacific Daylight Time

Offset: PDT is 7 hours behind Greenwich Mean Time (GMT).

Countries using this time zone: Mexico, United States

Principal Cities: The largest city in the PDT 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: HAP - Heure Avancée du Pacifique

Spanish: PT - Zona Noroeste

Map of the areas on Pacific Daylight Time (PDT)
PDT part of the year

Today all shaded areas are on PDT.

Open the world time zone map© OpenStreetMap

Daylight Saving: Pacific Daylight Time (PDT) is a daylight saving/summer time zone. During winter, some places set clocks back one hour and observe Pacific Standard Time (PST).

123456789101112Start: Pacific Daylight Time (PDT) started on Sunday, March 8, 2026 at 2:00 am02:00 local time and clocks were set one hour forward to Sunday, March 8, 2026, 3:00 am03:00. Daylight saving starts annually on the second Sunday of March.

123456789101112End: Pacific Daylight Time (PDT) ends on Sunday, November 1, 2026 at 2:00 am02:00 local time and clocks are set one hour back to Sunday, November 1, 2026, 1:00 am01:00 local standard time instead. Daylight saving ends annually on the first Sunday of November.

See USA daylight saving time and upcoming clock changes worldwide.

PDT representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • -07 - basic short
  • -0700 - basic
  • -07:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • -0700 - sign character (-) followed by a four digit time providing hours (07) and minutes (00) of the offset. Indicates an offset of seven hours to the west of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Tango - Military abbreviation for PDT
  • T - short form of 'Tango'
IANA/Olson: Reflects PDT time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • America/Ensenada
  • America/Los_Angeles
  • America/Santa_Isabel
  • America/Tijuana
  • America/Vancouver
  • Canada/Pacific
  • Mexico/BajaNorte
  • PST8PDT
  • US/Pacific
Time zones with the GMT -7 offset:
  • MST - Mountain Standard Time
  • PDT - Pacific Daylight Time
  • YST - Yukon Standard Time
  • T - Tango Time Zone

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 the lighter areas are on UTC+1 (British Summer Time, Irish Standard Time).

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

London Time Zone and Facts

Time Zone

Abbreviation / Offset
BST – British Summer Time, UTC+1 (now, daylight saving time)
GMT – Greenwich Mean Time, UTC+0 (standard time)
Daylight Saving Time Ends
123456789101112Sunday, October 25, 2026 at 2:00 amSunday, October 25, 2026 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.
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.
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
EST to ISTGMT to ESTPST to ESTEST to GMTPST to GMT