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BST
British Summer Time
GMT +1
12am
3am
6am
9am
12pm
3pm
6pm
9pm
MUT
Mauritius Time
GMT +4
12am
3am
6am
9am
12pm
3pm
6pm
9pm

Quick answers

Selected conversion

1:00 pm13:00 BST (UTC+1), Oct 11, 2026 = 4:00 pm16:00 MUT (UTC+4), Oct 11, 2026

BST is 3 hours behind MUT.

BST and MUT examples

These examples always use BST (UTC+1) and MUT (UTC+4). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.

BST is 3 hours behind MUT.

How the time difference changes

For most of the year, BST is 3 hours behind MUT. At other times of the year, GMT is 4 hours behind MUT.

For most of the year, working hours of 9:00 am to 5:00 pm in BST correspond to 12:00 pm to 8:00 pm in MUT. At other times of the year, working hours of 9:00 am to 5:00 pm in GMT correspond to 1:00 pm to 9:00 pm in MUT.For most of the year, working hours of 09:00 to 17:00 in BST correspond to 12:00 to 20:00 in MUT. At other times of the year, working hours of 09:00 to 17:00 in GMT correspond to 13:00 to 21:00 in MUT.

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

Time Difference

British Summer Time is 3 hours behind Mauritius Time.
1:00 pm13:00 in BST is 4:00 pm16:00 in MUT

BST to MUT call time
Best time for a conference call or a meeting is between 9am-2pm09:00-14:00 in BST which corresponds to 12pm-5pm12:00-17:00 in MUT

1:00 pm13:00 British Summer Time (BST). Offset UTC +1:00 hour
4:00 pm16:00 Mauritius Time (MUT). Offset UTC +4:00 hours

1:00 pm13:00 BST / 4:00 pm16:00 MUT

BSTMUT
12:00am3:00am
1:00am4:00am
2:00am5:00am
3:00am6:00am
4:00am7:00am
5:00am8:00am
6:00am9:00am
7:00am10:00am
8:00am11:00am
9:00am12:00pm
10:00am1:00pm
11:00am2:00pm
12:00pm3:00pm
1:00pm4:00pm
2:00pm5:00pm
3:00pm6:00pm
4:00pm7:00pm
5:00pm8:00pm
6:00pm9:00pm
7:00pm10:00pm
8:00pm11:00pm
9:00pm12:00am
10:00pm1:00am
11:00pm2:00am
00:0003:00
01:0004:00
02:0005:00
03:0006:00
04:0007:00
05:0008:00
06:0009:00
07:0010:00
08:0011:00
09:0012:00
10:0013:00
11:0014:00
12:0015:00
13:0016:00
14:0017:00
15:0018:00
16:0019:00
17:0020:00
18:0021:00
19:0022:00
20:0023:00
21:0000:00
22:0001:00
23:0002:00

British Summer Time

Offset: BST is 1 hour ahead Greenwich Mean Time (GMT) and is used in Europe

Countries using this time zone: Britain (UK), Guernsey, Isle of Man, Jersey

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

BST Time Zone Geo Map
BST timezone map

Daylight Saving: British Summer Time (BST) is a daylight saving/summer time zone. During winter, some places set clocks back one hour and observe Greenwich Mean Time (GMT).

Daylight saving time clock moves forward for one hourStart: British Summer Time (BST) started on Sunday, March 29, 2026 at 1:00 am01:00 local time and clocks were set one hour forward to Sunday, March 29, 2026, 2:00 am02:00. Daylight saving starts annually on the last Sunday of March.

Daylight saving time clock moves back for one hourEnd: British Summer Time (BST) ends on Sunday, October 25, 2026 at 2:00 am02:00 local time and clocks are set one hour back to Sunday, October 25, 2026, 1:00 am01:00 local standard time instead. Daylight saving ends annually on the last Sunday of October.

See upcoming clock changes worldwide.

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

Mauritius Time

Offset: MUT is 4 hours ahead Greenwich Mean Time (GMT) and is used in Africa

Countries using this time zone: Mauritius

Principal Cities: The largest city in the MUT time zone is Port Louis in Mauritius, with about 155,226 people. Other major cities in this time zone include Vacoas, Curepipe, Quatre Bornes, Triolet.

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

MUT Time Zone Geo Map
MUT timezone map

MUT representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +04 - basic short
  • +0400 - basic
  • +04:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +0400 - sign character (+) followed by a four digit time providing hours (04) and minutes (00) of the offset. Indicates an offset of four hours to the east of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Delta - Military abbreviation for MUT
  • D - short form of 'Delta'
Time zones with the GMT +4 offset:
  • KUYT - Kuybyshev Time
  • MSD - Moscow Daylight Time
  • SAMT - Samara Time
  • AMT - Armenia Time
  • AZT - Azerbaijan Time
  • D - Delta Time Zone
  • GET - Georgia Standard Time
  • GST - Gulf Standard Time
  • MUT - Mauritius Time
  • RET - Reunion Time
  • SCT - Seychelles Time