Boston to BST to PST Time Converter

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Boston
Massachusetts, USAEST
UTC−5
12am
3am
6am
9am
12pm
3pm
6pm
9pm
GMT/BST
Greenwich Mean Time
UTC+0
5h ahead
12am
3am
6am
9am
12pm
3pm
6pm
9pm
The United Kingdom is on standard time: GMT (UTC+0) until Sun, Mar 28, 2027.
Keep BST (UTC+1)
PST
Pacific Standard Time
UTC−8
3h behind
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 = 4:00 am04:00 PST (UTC-8), Nov 11, 2026

Boston is 5 hours behind GMT. Boston is 3 hours ahead of PST.

How the time difference changes

Boston to BST

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

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

Boston to PST

For most of the year, Boston is 3 hours ahead of PDT. From Nov 1, 2026 to Mar 14, 2027, and from Nov 7, 2027 to Mar 12, 2028, Boston is 3 hours ahead of PST. Briefly around clock changes, Boston is 4 hours ahead of PST or Boston is 2 hours ahead of PDT.

For most of the year, working hours of 9:00 am to 6:00 pm in Boston correspond to 6:00 am to 3:00 pm in PDT. At other times of the year, working hours of 9:00 am to 6:00 pm in Boston correspond to 6:00 am to 3:00 pm in PST.For most of the year, working hours of 09:00 to 18:00 in Boston correspond to 06:00 to 15:00 in PDT. At other times of the year, working hours of 09:00 to 18:00 in Boston correspond to 06:00 to 15:00 in PST.

Compare Boston time with BST and PST time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.

Time Difference

EST (Eastern Standard Time) is 5 hours behind Greenwich Mean Time. EST (Eastern Standard Time) is 3 hours ahead of Pacific Standard Time.
7:00 am07:00 in Boston, MA, USA is 12:00 pm12:00 in GMT and is 4:00 am04:00 in PST

Boston to GMT call time
Best time for a conference call or a meeting is between 9am-1pm09:00-13:00 in Boston which corresponds to 2pm-6pm14:00-18:00 in GMT.
Boston to PST call time
Best time for a conference call or a meeting is between 12pm-6pm12:00-18:00 in Boston which corresponds to 9am-3pm09:00-15:00 in PST.

7:00 am07:00 EST (Eastern Standard Time) (Boston, MA, USA). Offset UTC -5:00 hours
12:00 pm12:00 Greenwich Mean Time (GMT). Offset UTC 0:00 hours
4:00 am04:00 Pacific Standard Time (PST). Offset UTC -8:00 hours

7:00 am07:00 Boston, MA, USA / 12:00 pm12:00 GMT / 4:00 am04:00 PST

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
Boston, MA, USAGMTPST
5:00am9:00pm previous day
6:00am10:00pm previous day
7:00am11:00pm previous day
8:00am12:00am
9:00am1:00am
10:00am2:00am
11:00am3:00am
12:00pm4:00am
1:00pm5:00am
2:00pm6:00am
3:00pm7:00am
4:00pm8:00am
5:00pm9:00am
6:00pm10:00am
7:00pm11:00am
8:00pm12:00pm
9:00pm1:00pm
10:00pm2:00pm
11:00pm3:00pm
12:00am next day4:00pm
1:00am next day5:00pm
2:00am next day6:00pm
3:00am next day7:00pm
4:00am next day8:00pm
05:0021:00 previous day
06:0022:00 previous day
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00:00 next day16:00
01:00 next day17:00
02:00 next day18:00
03:00 next day19:00
04:00 next day20:00

Boston Time Zone and Facts

Time Zone

Abbreviation / Offset
EST – Eastern Standard Time, UTC-5 (now)
EDT – Eastern Daylight Time, UTC-4 (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 (EDT). 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 (EST). 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

Boston Facts

Country
USA
State
Massachusetts
Alternative Names
BOS, Baston, Bostan, Boston, Bostona, Bostonas, Bostone, Bostonia, Bostono, Bostons, Bostun, Bostún, Mushauwomuk, Old Boston, Po-su-tun, Pokekona, Pô-sṳ-tun, Shawmut, Shawmutt, Shawnnut, Totant, Tramount, Tremont, Trimountain, Trimountaine, Vostoni, Wahstoronon:ke, Wahstoronòn:ke, Wastok, bastan, bastana, bausatana, beasrraൺ, bo shi dun, boseuteon, bostan, bostana, bostʼoni, bosuton, bwstn, bwstwn, bxstan, pastan, Βοστωνη, Βοστώνη, Бостан, Бостон, Бостън, Բոստոն, באסטאן, בוסטון, بوستون, بوسطن, بوسٹن, بۆستن, ܒܘܣܛܘܢ, बस्तन, बास्टन्, बॉस्टन, बोस्टन, বস্টন, ਬੌਸਟਨ, பாஸ்டன், బోస్టన్, ಬಾಸ್ಟನ್, ബോസ്റ്റൺ, บอสตัน, བོ་སེ་ཊོན།, ဘော့စတွန်မြို့, ბოსტონი, ቦስቶን, ボストン, 波士頓, 波士顿, 보스턴
Population
653,833
Currency
Dollar (USD)
Geographic Coordinates
42° 21' N Latitude / 71° 03' W Longitude
International Dialing Code
+1
More About Boston
Boston time now

British Summer Time

Offset: BST is 1 hour ahead of Greenwich Mean Time (GMT).

Countries using this time zone: Guernsey, Isle of Man, Jersey, United Kingdom

Principal Cities: The largest city in the BST time zone is London in the United Kingdom, with about 8.962 million people. Other major cities in this time zone include Birmingham, Glasgow, Manchester, Sheffield.

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.

Current time in the United Kingdom: UK time now

Map of the areas on British Summer Time (BST)
BST part of the year

Today the shaded areas are on UTC+0 (GMT).

Open the world time zone map© OpenStreetMap

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 an offset of one hour 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 - Mitteleuropäische Zeit
  • WAT - West Africa Time
  • WST - Western Sahara Summer Time
  • BMT - Biel Mean Time

Pacific Standard Time

Offset: PST is 8 hours behind Greenwich Mean Time (GMT).

Countries using this time zone: Mexico, United States

Principal Cities: The largest city in the PST 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: HNP - Heure Normale du Pacifique

Spanish: PT - Tiempo del Pacífico, PT - Zona Noroeste

Map of the areas on Pacific Standard Time (PST)
PST part of the year

Today all shaded areas are on PST.

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 Pacific Daylight Time (PDT).

123456789101112Start: Pacific Standard Time (PST) 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: Pacific Standard Time (PST) 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.

PST 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 west of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Uniform - Military abbreviation for PST
  • U - short form of 'Uniform'
IANA/Olson: Reflects PST 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
PST Abbreviation: Several time zones share PST abbreviation and it could refer to these time zones
  • Pacific Standard Time - UTC -8
  • Pitcairn Standard Time - UTC -8
Time zones with the GMT -8 offset:
  • AKDT - Alaska Daylight Time
  • PST - Pacific Standard Time
  • PT - Pacific Time
  • PST - Pitcairn Standard Time
  • U - Uniform Time Zone