Does it account for Daylight Saving Time?

Yes, our converter uses the IANA timezone database, which includes all current DST rules for every timezone in the world.

UTC (Coordinated Universal Time) is the primary time standard by which the world regulates clocks. All timezones are defined as offsets from UTC.

Can I compare multiple timezones at once?

Yes, you can add multiple cities or timezones and see the equivalent times side by side.

How many timezones are there in the world?

There are 38 distinct UTC offsets in use, ranging from UTC-12 to UTC+14. This includes half-hour (UTC+5:30 India, UTC+9:30 Australia) and 45-minute offsets (UTC+5:45 Nepal, UTC+8:45 Australia).

What is the International Date Line?

The International Date Line (IDL) runs roughly along the 180° meridian in the Pacific Ocean. When you cross it westward, you gain a day; crossing eastward, you lose a day.

Why do some timezones have 30 or 45 minute offsets?

Countries chose offsets that best matched their solar noon. India uses UTC+5:30 and Nepal uses UTC+5:45 because standard hourly offsets didn't align well with their geography.

Which country has the most timezones?

France has the most (12 timezones) due to overseas territories. Russia spans 11 timezones. The US has 6 (including Hawaii and Alaska).

United Kingdom to MDT

-7h

United Kingdom

BSTSOURCE

UTC+01:00☀ DST active

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

MDT

UTC-06:00☀ DST active

HH05

MM00

05:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

United Kingdom

MDT

12:00 AM

5:00 PM-1

2:00 AM

7:00 PM-1

4:00 AM

9:00 PM-1

6:00 AM

11:00 PM-1

8:00 AM

1:00 AM

10:00 AM

3:00 AM

12:00 PM

5:00 AM

2:00 PM

7:00 AM

4:00 PM

9:00 AM

6:00 PM

11:00 AM

8:00 PM

1:00 PM

10:00 PM

3:00 PM

Green rows indicate typical business hours (9 AM - 5 PM)

BST and MDT on the World Map

The map below highlights the BST (Greenwich Mean Time) and MDT (Mountain Daylight Time) timezone regions across the globe.

BST Zone

→

MDT Zone

Explore all world timezones interactively →

GMT – Greenwich Mean Time

UTC+00:00

Greenwich Mean Time (GMT) is the mean solar time at the Royal Observatory in Greenwich, London. It is the same as UTC+00:00.

Countries in GMT

United KingdomIrelandIcelandPortugal (mainland)GhanaSenegalMaliMauritaniaGambiaGuineaSierra LeoneLiberiaIvory CoastBurkina FasoMorocco (historically)

Major Cities in GMT

LondonDublinLisbonAccraReykjavikEdinburghCasablancaDakarBamakoAbidjanConakryFreetownMonrovia

Key Facts about GMT

•GMT is based on the Prime Meridian (0° longitude) passing through Greenwich, London.
•The Royal Observatory in Greenwich has been the reference point for GMT since 1884.
•GMT and UTC are often used interchangeably, but UTC is based on atomic clocks.
•Iceland uses GMT year-round and never observes daylight saving time.
•The UK switches from GMT to BST (British Summer Time) in late March each year.

Daylight Saving:Yes – switches to BST

Learn more about GMT on Wikipedia

MDT – Mountain Daylight Time

UTC-06:00

Mountain Daylight Time (MDT) is the daylight saving offset in the Mountain Time Zone, 6 hours behind UTC.

Countries in MDT

United States (Mountain)Canada (Alberta)

Major Cities in MDT

DenverCalgaryEdmontonSalt Lake CityBoise

Key Facts about MDT

•MDT shares the same offset as CST (UTC-06:00).
•Arizona does not switch to MDT, remaining on MST.

Daylight Saving:Yes – switches to MST

Learn more about MDT on Wikipedia

United Kingdom to MDT Time Difference – Complete Guide

United Kingdom runs on British Summer Time (BST) at UTC+01:00, currently observing daylight saving time. MDT runs on Mountain Daylight Time (MDT) at UTC-06:00. That puts United Kingdom 7 hours behind MDT — a difference of -7h at the current offsets.

In practice, when it is 9:00 AM in United Kingdom it is 2:00 AM in MDT. Midnight in United Kingdom is 5:00 PM in MDT.United Kingdom observes daylight saving time while MDT does not, so the gap narrows or widens by an hour part of the year.

United Kingdom to MDT time conversion table

United Kingdom (BST)	MDT (MDT)	Day
12:00 AM	5:00 PM	previous day
6:00 AM	11:00 PM	previous day
7:00 AM	12:00 AM	same day
8:00 AM	1:00 AM	same day
9:00 AM	2:00 AM	same day
12:00 PM	5:00 AM	same day
3:00 PM	8:00 AM	same day
5:00 PM	10:00 AM	same day
6:00 PM	11:00 AM	same day
9:00 PM	2:00 PM	same day

Why people convert United Kingdom to MDT time

Scheduling a call from United Kingdom to MDT: a 10:00 AM start in United Kingdom lands at 3:00 AM in MDT, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both United Kingdom and MDT are inside the 9-to-5 working day between 4:00 PM and 5:00 PM BST time (9:00 AM–10:00 AM MDT). That is roughly 1 hours of usable overlap.
Keeping family and friends in sync: knowing that 8:00 PM in United Kingdom is 1:00 PM in MDT makes it easy to avoid calling at 3 AM.

Always state the zone abbreviation, not just the hour. "3:00 PM BST" is unambiguous; "3 PM" across a -7h gap is not.
Block 4:00 PM–5:00 PM BST as the recurring meeting window if you work primarily from United Kingdom and need MDT colleagues present.
United Kingdom: Clocks fall back on Sun, Oct 25, 2026. Re-check this page after that date because the offset changes and so does the -7h gap.

About GMT (Greenwich Mean Time)

Greenwich Mean Time (GMT) is the clock time at the Royal Observatory in Greenwich, London, which sits on the Prime Meridian (0° longitude). GMT serves as the reference point from which all other time zones are calculated. The United Kingdom uses GMT during winter months and switches to British Summer Time (BST, UTC+01:00) from late March to late October. Several West African nations use GMT year-round. GMT is often used interchangeably with UTC (Coordinated Universal Time), although technically they are different – UTC is based on atomic clocks while GMT is based on Earth's rotation.

About MDT (Mountain Daylight Time)

Mountain Daylight Time (MDT) is observed during summer months in the Mountain Time Zone, except in Arizona which stays on MST year-round. MDT aligns with Central Standard Time (CST) at UTC-06:00.

Best time to call between United Kingdom and MDT

Both United Kingdom and MDT sit inside the 9 AM – 5 PM working day between 4:00 PM–5:00 PM BST, which is 9:00 AM–10:00 AM MDT. That gives roughly 1 hours of shared time — the safest window for a live call or meeting.

Business hours overlap

United Kingdom and MDT overlap for only 60 minutes (4:00 PM–5:00 PM BST), so meetings have to be booked precisely.

United Kingdom is 7 hours behind MDT (BST UTC+01:00 → MDT UTC-06:00). The shared working window is 4:00 PM–5:00 PM BST. Remember to re-check around daylight-saving transitions.

🕐 Daylight Saving Time Info

United Kingdom

☀ Currently in DST

Standard: UTC+00:00 · DST: UTC+01:00

Clocks fall back on Sun, Oct 25, 2026

MDT

☀ Currently in DST

Standard: UTC-07:00 · DST: UTC-06:00

Clocks fall back on Sun, Nov 1, 2026

Learn More About Time

Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:

⏳

History of Timekeeping

From sundials to atomic clocks - 5000 years of measuring time

🌍

How Time Zones Work

UTC, offsets, and why zones don't follow straight lines

☀️

Daylight Saving Time

DST dates, which countries observe it, and the ongoing debate

Frequently Asked Questions

What is the time difference between United Kingdom and MDT?

United Kingdom (BST, UTC+01:00) is 7 hours behind MDT (MDT, UTC-06:00). The gap is currently -7h.

How do I convert United Kingdom time to MDT time?

Add -7h to United Kingdom local time. For example, 9:00 AM in United Kingdom is 2:00 AM in MDT.

What time is it in MDT right now?

MDT uses MDT at UTC-06:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -7h offset from United Kingdom.

What is the best time to call MDT from United Kingdom?

Call between 4:00 PM and 5:00 PM BST — that maps to 9:00 AM–10:00 AM MDT and keeps both parties inside the working day.

Which is behind, United Kingdom or MDT?

United Kingdom is 7 hours behind MDT. When it is 12:00 PM in United Kingdom it is 5:00 AM in MDT.

Do United Kingdom and MDT use different time zones?

United Kingdom (United Kingdom) uses BST at UTC+01:00, while MDT uses MDT at UTC-06:00. The IANA identifiers are Europe/London and America/Denver.

Does daylight saving time affect the United Kingdom–MDT difference?

Yes at the moment: United Kingdom is on daylight saving time and MDT is not, so the -7h gap shifts by an hour when exactly one of them changes clocks.

Which other cities share United Kingdom's time zone?

BST also covers London, Dublin, Lisbon, Accra, Reykjavik, Edinburgh, Casablanca, Dakar and 5 more.

Which countries use BST, United Kingdom's zone?

BST is used in United Kingdom, Ireland, Iceland, Portugal (mainland), Ghana, Senegal, Mali, Mauritania and 7 more.

Is there a day difference between United Kingdom and MDT?

Not normally. The -7h gap only pushes the date over the previous day.

What is the time difference between United Kingdom and MDT?

MDT is -7h from United Kingdom.

What timezone is United Kingdom in?

United Kingdom operates on its local timezone.

What timezone is MDT in?

MDT operates on its local timezone.

Which countries use GMT (Greenwich Mean Time)?

GMT is used in United Kingdom, Ireland, Iceland, Portugal (mainland), Ghana, Senegal, and 9 more countries.

Does GMT observe daylight saving time?

Yes, GMT switches to BST during summer months.

What are some interesting facts about GMT?

GMT is based on the Prime Meridian (0° longitude) passing through Greenwich, London. The Royal Observatory in Greenwich has been the reference point for GMT since 1884.