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BST
British Summer Time
GMT +1
12am
3am
6am
9am
12pm
3pm
6pm
9pm
PYST
Paraguay Summer Time
GMT -3
12am
3am
6am
9am
12pm
3pm
6pm
9pm

Quick answers

Selected conversion

1:00 pm BST (UTC+1), Oct 3, 2026 = 9:00 am PYST (UTC-3), Oct 3, 202613:00 BST (UTC+1), Oct 3, 2026 = 09:00 PYST (UTC-3), Oct 3, 2026

BST is 4 hours ahead of PYST.

BST and PYST examples

These examples always use BST (UTC+1) and PYST (UTC-3). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.

BST is 4 hours ahead of PYST.

How the time difference changes

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

For most of the year, working hours of 9:00 am to 5:00 pm in BST correspond to 5:00 am to 1:00 pm in PYST. At other times of the year, working hours of 9:00 am to 5:00 pm in GMT correspond to 6:00 am to 2:00 pm in PYST.For most of the year, working hours of 09:00 to 17:00 in BST correspond to 05:00 to 13:00 in PYST. At other times of the year, working hours of 09:00 to 17:00 in GMT correspond to 06:00 to 14:00 in PYST.

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

Time Difference

British Summer Time is 4 hours ahead of Paraguay Summer Time
1:00 pm13:00 in BST is 9:00 am09:00 in PYST

BST to PYST call time
Best time for a conference call or a meeting is between 1pm-5pm13:00-17:00 in BST which corresponds to 9am-1pm09:00-13:00 in PYST

1:00 pm13:00 British Summer Time (BST). Offset UTC +1:00 hour
9:00 am09:00 Paraguay Summer Time (PYST). Offset UTC -3:00 hours

1:00 pm13:00 BST / 9:00 am09:00 PYST

BSTPYST
12am (midnight)8pm
1am9pm
2am10pm
3am11pm
4am12am (midnight)
5am1am
6am2am
7am3am
8am4am
9am5am
10am6am
11am7am
12pm (noon)8am
1pm9am
2pm10am
3pm11am
4pm12pm (noon)
5pm1pm
6pm2pm
7pm3pm
8pm4pm
9pm5pm
10pm6pm
11pm7pm
00:0020:00
01:0021:00
02:0022:00
03:0023:00
04:0000:00
05:0001:00
06:0002:00
07:0003:00
08:0004:00
09:0005:00
10:0006:00
11:0007:00
12:0008:00
13:0009:00
14:0010:00
15:0011:00
16:0012:00
17:0013:00
18:0014:00
19:0015:00
20:0016:00
21:0017:00
22:0018:00
23:0019:00

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

Paraguay Summer Time

Offset: PYST is 3 hours behind Greenwich Mean Time (GMT) and is used in South America

Countries using this time zone: Paraguay

Principal Cities: The largest city in the PYST time zone is Asuncion in Paraguay, with about 1.482 million people. Other major cities in this time zone include Ciudad del Este, San Lorenzo, Capiata, Lambare.

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

PYST Time Zone Geo Map
PYST timezone map

PYST representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • -03 - basic short
  • -0300 - basic
  • -03:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • -0300 - sign character (-) followed by a four digit time providing hours (03) and minutes (00) of the offset. Indicates an offset of three hours to the west of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Papa - Military abbreviation for PYST
  • P - short form of 'Papa'
Time zones with the GMT -3 offset:
  • ADT - Atlantic Daylight Time
  • PMT - Pierre & Miquelon Standard Time
  • PMST - Pierre & Miquelon Standard Time
  • AMST - Amazon Summer Time
  • ART - Argentina Time
  • BRT - Brasília time
  • CLST - Chile Summer Time
  • FKST - Falkland Islands Summer Time
  • GFT - French Guiana Time
  • P - Papa Time Zone
  • PYST - Paraguay Summer Time
  • SRT - Suriname Time
  • UYT - Uruguay Time