Difference Between
versus

GMT vs. BST: Know the Difference

Shumaila Saeed
By Shumaila Saeed || Published on January 3, 2024
GMT (Greenwich Mean Time) is the time zone at the Prime Meridian, used year-round; BST (British Summer Time) is GMT+1, used in the UK during daylight saving time.
GMT vs. BST

Key Differences

Greenwich Mean Time (GMT) is the mean solar time at the Royal Observatory in Greenwich, London, and is considered the standard time against which all other time zones are set. British Summer Time (BST) is the daylight saving time observed in the UK, where clocks are advanced by one hour from GMT during the summer months.
Shumaila Saeed
Shumaila Saeed
Jan 03, 2024
GMT remains constant throughout the year, serving as a reference point for coordinating international time. BST, on the other hand, is a seasonal adjustment, typically beginning on the last Sunday in March and ending on the last Sunday in October, effectively moving an hour of daylight from morning to evening.
Shumaila Saeed
Shumaila Saeed
Jan 03, 2024
GMT is often used as a global time standard, crucial for international communications, aviation, and the internet. In contrast, BST is a local time adjustment specific to the UK and affects daily schedules, broadcasting timings, and business operations during its period of application.
Shumaila Saeed
Shumaila Saeed
Jan 03, 2024
In GMT, there is no alteration for daylight saving, reflecting the solar time at the Prime Meridian. BST, however, is designed to make better use of natural daylight during the longer days of summer in the UK.
Shumaila Saeed
Shumaila Saeed
Jan 03, 2024
While GMT is a time zone without any daylight saving adjustments, BST effectively shifts the time zone to GMT+1, aligning the UK's daytime hours more closely with daylight during the summer months.
Shumaila Saeed
Shumaila Saeed
Jan 03, 2024
ADVERTISEMENT

Comparison Chart

Definition

Mean solar time at the Prime Meridian in Greenwich, London.
Daylight saving time in the UK, one hour ahead of GMT.
Shumaila Saeed
Shumaila Saeed
Jan 03, 2024

Daylight Saving Adjustment

No adjustment for daylight saving.
Adjusted forward by one hour during summer months.
Shumaila Saeed
Shumaila Saeed
Jan 03, 2024

Period of Use

Used year-round.
Used typically between the last Sunday in March and the last Sunday in October.
Shumaila Saeed
Shumaila Saeed
Jan 03, 2024

Global Impact

Global time standard, used for coordination across time zones.
Local to the UK, affects only national activities and schedules.
Shumaila Saeed
Shumaila Saeed
Jan 03, 2024

Time Zone Offset

0 hours from the Prime Meridian.
+1 hour from GMT during its period of application.
Shumaila Saeed
Shumaila Saeed
Jan 03, 2024
ADVERTISEMENT

GMT and BST Definitions

GMT

GMT is the mean solar time at the Royal Observatory in Greenwich, London.
The international conference call is scheduled for 3 PM GMT.
Shumaila Saeed
Shumaila Saeed
Dec 19, 2023

BST

BST starts on the last Sunday in March and ends in October.
BST ends when the UK returns to GMT in autumn.
Shumaila Saeed
Shumaila Saeed
Dec 19, 2023

GMT

GMT serves as the world's time standard.
Global stock markets synchronize their clocks with GMT.
Shumaila Saeed
Shumaila Saeed
Dec 19, 2023

BST

BST is used to make better use of daylight.
BST helps conserve energy by reducing the need for artificial light in the evenings.
Shumaila Saeed
Shumaila Saeed
Dec 19, 2023

GMT

GMT remains constant as the Prime Meridian's solar time.
Scientists often record data in GMT to avoid confusion with time zones.
Shumaila Saeed
Shumaila Saeed
Dec 19, 2023
ADVERTISEMENT

BST

BST is the UK's daylight saving time, one hour ahead of GMT.
Clocks in the UK are set to BST during summer.
Shumaila Saeed
Shumaila Saeed
Dec 19, 2023

GMT

GMT is used to coordinate time across different time zones.
Flight departures are listed in GMT for consistency.
Shumaila Saeed
Shumaila Saeed
Dec 19, 2023

BST

BST shifts time to align with daylight during summer months.
During BST, evenings in the UK have more daylight.
Shumaila Saeed
Shumaila Saeed
Dec 19, 2023

GMT

GMT does not change throughout the year.
Coordinated Universal Time (UTC) is based on GMT.
Shumaila Saeed
Shumaila Saeed
Dec 19, 2023

BST

BST is specific to the UK and affects local schedules.
Television programming in the UK shifts to accommodate BST.
Shumaila Saeed
Shumaila Saeed
Dec 19, 2023

GMT

The local time at the 0 meridian passing through Greenwich, England; it is the same everywhere
Shumaila Saeed
Shumaila Saeed
Dec 13, 2023

Repeatedly Asked Queries

What is GMT?

Greenwich Mean Time is the mean solar time at the Prime Meridian in Greenwich, London.
Shumaila Saeed
Shumaila Saeed
Jan 03, 2024

Why was BST introduced?

BST was introduced to make better use of natural daylight during summer.
Shumaila Saeed
Shumaila Saeed
Jan 03, 2024

How does GMT differ from BST?

GMT is a constant time standard, while BST is GMT+1, applied as daylight saving time in the UK.
Shumaila Saeed
Shumaila Saeed
Jan 03, 2024

Is GMT affected by daylight saving?

No, GMT remains the same throughout the year.
Shumaila Saeed
Shumaila Saeed
Jan 03, 2024

When is BST observed?

BST is observed from the last Sunday in March to the last Sunday in October.
Shumaila Saeed
Shumaila Saeed
Jan 03, 2024

What is BST?

British Summer Time is the UK's daylight saving time, one hour ahead of GMT.
Shumaila Saeed
Shumaila Saeed
Jan 03, 2024

Why is GMT important for aviation?

GMT provides a consistent time reference for flight schedules and air traffic control.
Shumaila Saeed
Shumaila Saeed
Jan 03, 2024

Do all countries use GMT?

GMT is a reference time, but not all countries adopt it for their standard time.
Shumaila Saeed
Shumaila Saeed
Jan 03, 2024

How do international businesses manage GMT and BST differences?

They adjust meeting and operation times according to the relevant time zone.
Shumaila Saeed
Shumaila Saeed
Jan 03, 2024

Is BST observed worldwide?

No, BST is specific to the UK.
Shumaila Saeed
Shumaila Saeed
Jan 03, 2024

What is the time difference between GMT and BST?

BST is one hour ahead of GMT.
Shumaila Saeed
Shumaila Saeed
Jan 03, 2024

How does BST impact daily life in the UK?

BST alters the timing of activities to align with longer daylight hours in summer.
Shumaila Saeed
Shumaila Saeed
Jan 03, 2024

What happens when BST ends?

The UK reverts to GMT, setting clocks back by one hour.
Shumaila Saeed
Shumaila Saeed
Jan 03, 2024

Does the change to BST affect international communication?

It can, as UK-based communications shift by one hour.
Shumaila Saeed
Shumaila Saeed
Jan 03, 2024

How is GMT determined?

GMT is based on solar time at the Royal Observatory in Greenwich, London.
Shumaila Saeed
Shumaila Saeed
Jan 03, 2024

Do other countries have a similar concept to BST?

Many countries observe daylight saving time, adjusting clocks similar to BST.
Shumaila Saeed
Shumaila Saeed
Jan 03, 2024

Can GMT and BST be used interchangeably?

No, they differ by one hour during the BST period.
Shumaila Saeed
Shumaila Saeed
Jan 03, 2024

Does BST apply to all of the UK?

Yes, the whole of the UK shifts to BST during summer.
Shumaila Saeed
Shumaila Saeed
Jan 03, 2024

Are there any disadvantages to BST?

Adjusting to the time change can impact sleep patterns and schedules.
Shumaila Saeed
Shumaila Saeed
Jan 03, 2024

How do electronic devices adjust for GMT and BST?

Most devices automatically update their clocks based on set time zone rules.
Shumaila Saeed
Shumaila Saeed
Jan 03, 2024

Share this page

Link for your blog / website
HTML
Link to share via messenger
About Author
Shumaila Saeed
Written by
Shumaila Saeed
Shumaila Saeed, an expert content creator with 6 years of experience, specializes in distilling complex topics into easily digestible comparisons, shining a light on the nuances that both inform and educate readers with clarity and accuracy.

Popular Comparisons

Trending Comparisons

Poster vs. InfographicPoster vs. Infographic
Shumaila SaeedShumaila Saeed
December 25, 2023
A Poster is a large printed image or notice for public display, while an Infographic is a visual representation of information or data.
FPTP vs. PRFPTP vs. PR
Shumaila SaeedShumaila Saeed
February 16, 2024
FPTP (First Past the Post) is a simple plurality voting system where the candidate with most votes wins; PR (Proportional Representation) allocates seats based on the proportion of votes each party receives.
Japanese Eyes vs. Chinese EyesJapanese Eyes vs. Chinese Eyes
Shumaila SaeedShumaila Saeed
December 25, 2023
Japanese Eyes and Chinese Eyes refer to linguistic structures in Japanese and Chinese respectively, each reflecting unique aspects of grammar and syntax.
2 Pole Motors vs. 4 Pole Motors2 Pole Motors vs. 4 Pole Motors
Shumaila SaeedShumaila Saeed
December 25, 2023
2 Pole Motors have one pair of magnetic poles and run at higher speeds, while 4 Pole Motors have two pairs of poles and operate at lower speeds, offering higher torque.
Login vs. LogonLogin vs. Logon
Shumaila SaeedShumaila Saeed
December 25, 2023
"Login" and "Logon" are often used interchangeably to describe the process of gaining access to a computer system, but "login" can also refer to the credentials used for access.
Poem vs. PoetryPoem vs. Poetry
Shumaila SaeedShumaila Saeed
December 25, 2023
A poem is a piece of writing that expresses ideas and emotions with a distinctive style and rhythm; poetry is the art form of writing such pieces.
Nuclear Family vs. Joint FamilyNuclear Family vs. Joint Family
Shumaila SaeedShumaila Saeed
January 9, 2024
Nuclear Family is a family unit consisting of parents and their children. Joint Family is a larger family structure comprising parents, children, and other relatives living together.
Pulley vs. SheavePulley vs. Sheave
Hifza NasirHifza Nasir
April 4, 2024
A pulley is a wheel on an axle designed to support movement and change of direction of a taut cable, while a sheave is the wheel part of a pulley system that specifically interacts with the cable.
NM3 vs. M3NM3 vs. M3
Hifza NasirHifza Nasir
April 19, 2024
NM3 measures gas volume under Normal conditions (0°C and 1.01325 bar), while M3 measures volume under the conditions at which it is measured, without standard adjustment.
Vital Proteins Collagen vs. OrganikaVital Proteins Collagen vs. Organika
Shumaila SaeedShumaila Saeed
February 9, 2024
Vital Proteins Collagen is a brand offering collagen supplements for health and beauty, while Organika is a broader health and wellness brand with diverse products including collagen.
Pycharm Community vs. Pycharm ProPycharm Community vs. Pycharm Pro
Shumaila SaeedShumaila Saeed
February 4, 2024
PyCharm Community is a free, open-source IDE for Python development, while PyCharm Pro is a paid version with additional advanced features like web development support and database tools.
Slazenger Logo vs. Puma LogoSlazenger Logo vs. Puma Logo
Shumaila SaeedShumaila Saeed
February 15, 2024
The Slazenger logo features a panther, symbolizing agility and tradition, while the Puma logo depicts a leaping puma, representing speed and strength.
Data Roaming vs. Cellular DataData Roaming vs. Cellular Data
Shumaila SaeedShumaila Saeed
December 25, 2023
Data Roaming allows usage of mobile network services outside of the home network area, while Cellular Data is using mobile services within the home network.
Gorilla Glass 3 vs. Gorilla Glass 5Gorilla Glass 3 vs. Gorilla Glass 5
Shumaila SaeedShumaila Saeed
January 1, 2024
Gorilla Glass 3 offers improved scratch resistance and durability compared to its predecessors, while Gorilla Glass 5 focuses on enhanced drop protection and toughness.
Catapult vs. TrebuchetCatapult vs. Trebuchet
Shumaila SaeedShumaila Saeed
January 4, 2024
A catapult is a ballistic device using tension or torsion to launch projectiles, while a trebuchet is a type of catapult using a counterweight for greater force and distance.
Fluid vs. LiquidFluid vs. Liquid
Shumaila SaeedShumaila Saeed
February 13, 2024
Fluids encompass all substances that flow (including gases and liquids), while liquids specifically refer to fluids with a definite volume but no fixed shape, adapting to their container.
DDR3 vs. DDR3LDDR3 vs. DDR3L
Shumaila SaeedShumaila Saeed
January 29, 2024
DDR3 is a type of RAM with standard voltage (1.5V), while DDR3L is a low voltage variant (1.35V) compatible with both 1.5V and 1.35V slots.
Crane vs. HeronCrane vs. Heron
Shumaila SaeedShumaila Saeed
June 24, 2024
Cranes are large, long-legged and long-necked birds known for their elaborate dances, while herons are typically more solitary, stealth hunters with a distinctive S-shaped neck.
Pebble vs. StonePebble vs. Stone
Dua FatimaDua Fatima
May 30, 2024
A pebble is a small, smooth rock worn by water or weather, typically found on beaches or rivers, while a stone is a larger, more varied rock that can be rough or smooth, used in construction or as a tool.
NDM vs. FTPNDM vs. FTP
Shumaila SaeedShumaila Saeed
February 15, 2024
NDM (Network Data Mover) automates and secures data transfers across networks, while FTP (File Transfer Protocol) is a standard network protocol for transferring files between computers.
5'11" vs. 6'0"5’11” vs. 6’0″
Shumaila SaeedShumaila Saeed
February 4, 2024
The difference between 5'11" and 6'0" is one inch, with 5'11" being 71 inches and 6'0" being 72 inches tall.
PPM vs. PPMVPPM vs. PPMV
Shumaila SaeedShumaila Saeed
February 10, 2024
PPM (parts per million) measures the concentration of one substance within a million parts of another. PPMV (parts per million by volume) expresses gas concentration as volume per million volumes of air.
Traditional Trade vs. Modern TradeTraditional Trade vs. Modern Trade
Shumaila SaeedShumaila Saeed
December 25, 2023
Traditional trade involves local, small-scale, often personalized commerce; modern trade is characterized by large-scale, technology-driven, and impersonal retail environments.
Seed vs. GrainSeed vs. Grain
Shumaila SaeedShumaila Saeed
January 24, 2024
A seed is a plant's reproductive unit capable of developing into another plant, while a grain is a type of seed harvested from cereal plants, often used for food.

Featured Comparisons

New Comparisons