British Summer Time (bst) is used in United Kingdom. The IANA timezone identifier is Europe/London.

Pakistan Standard Time (pkt) is used in Pakistan. The IANA timezone identifier is Asia/Karachi.

BST to PKT Time Converter

British Summer Time → Pakistan Standard Time

BST = UTC+1PKT = UTC+5

⚠️ BST is ambiguous — on this page it means British Summer Time. It also refers to:

Bangladesh Standard Time (Dhaka) → PKT ↗

ClockinSync

BASE

09:00

Work Clients Team +

00:0006:0012:0018:0024:00

PKT (Karachi)

Pakistan · +4h

13:00

New York

USA · -5h

04:00

Tokyo

Japan · +8h

17:00

Dubai

United Arab Emirates · +3h

12:00

Sydney

Australia · +9h

18:00

BST (London) ↔ PKT (Karachi) — time offset

BST (London) is 4 hours behind PKT (Karachi). Midday in BST (London) lines up with 16:00 in PKT (Karachi).

BST (London) is in the Europe/London timezone. PKT (Karachi) is in Asia/Karachi. The difference is 4 hours.

Mutual working hours

There is a 4-hour window each day where both BST (London) and PKT (Karachi) are within standard business hours (09:00–17:00).

00:0006:0012:0018:0024:00

BST (London)

PKT (Karachi)

Overlap (4h)

When to schedule across time zones

Both BST (London) and PKT (Karachi) are in standard hours simultaneously for 4h per day. 3 recommended slots shown below.

09:00 London / 13:00 Karachi✓ Both working

10:00 London / 14:00 Karachi✓ Both working

11:00 London / 15:00 Karachi✓ Both working

Based on standard 09:00–17:00 working hours in each location's local time.

Upcoming public holidays

BST (London)7 holidays

Jun 15World Cup Bank HolidaySOON

Jul 13Battle of the Boyne

Aug 3Summer Bank Holiday

Aug 31Summer Bank Holiday

Nov 30Saint Andrew's Day

PKT (Karachi)

No upcoming public holidays this year.

How to work with BST (London) and PKT (Karachi) time zones

Working across BST (London) (United Kingdom) and PKT (Karachi) (Pakistan) involves a 4-hour gap. The good news: there is a 4-hour mutual window in standard business hours that lets both sides collaborate without anyone joining at an unreasonable hour.

💡 How to schedule across these time zones

✅

09:00–10:00 in BST (London) = 13:00–14:00 in PKT (Karachi). Both sides are in standard business hours during this window.

✅

10:00–11:00 in BST (London) = 14:00–15:00 in PKT (Karachi). Both sides are in standard business hours during this window.

✅

11:00–12:00 in BST (London) = 15:00–16:00 in PKT (Karachi). Both sides are in standard business hours during this window.

DST transitions can silently shift your meeting times by an hour. The ClockinSync Chrome Extension tracks these changes automatically so you never get caught off guard.

Get the Extension — Free →

Use the time slider above to find the exact equivalent time for any moment in BST (London). The input bar accepts natural language like "3pm", "15:30", or "9am Rome" for instant conversions.

BST (London) ↔ PKT (Karachi)

4h of business hours overlap daily (09:00–17:00)

BST (London)

PKT (Karachi)

00:00

04:00

01:00

05:00

02:00

06:00

03:00

07:00

04:00

08:00

05:00

09:00Working

06:00

10:00Working

07:00

11:00Working

08:00

12:00Working

09:00Working

13:00Working

10:00Working

14:00Working

11:00Working

15:00Working

12:00Working

16:00Working

13:00Working

17:00off

14:00Working

18:00off

15:00Working

19:00off

16:00Working

20:00off

17:00

21:00

18:00

22:00

19:00

23:00

20:00

00:00+1d

21:00

01:00+1d

22:00

02:00+1d

23:00

03:00+1d

Working hours: 09:00–17:00 local. Green = both working. Purple = one side only.

Frequently Asked Questions

What is the difference between bst and pkt?

British Summer Time (bst) is UTC+1 and Pakistan Standard Time (pkt) is UTC+5. The difference between them is 4 hours.

Where is bst used?

British Summer Time (bst) is used in United Kingdom and surrounding regions. The IANA timezone identifier is Europe/London. Note: bst is ambiguous and may refer to other timezones.

Where is pkt used?

Pakistan Standard Time (pkt) is used in Pakistan and surrounding regions. The IANA timezone identifier is Asia/Karachi.

How do I convert bst to pkt?

Use the interactive converter above. Drag the time slider to any bst time and the pkt equivalent updates instantly. You can also type a time like "3pm" or "15:00" in the input bar.

Popular BST conversions

BST → New York BST → Tokyo BST → Dubai BST → Sydney BST → Paris BST → Berlin BST → Singapore BST → Los Angeles BST → Toronto BST → Mumbai

Popular PKT conversions

London → PKT New York → PKT Tokyo → PKT Dubai → PKT Sydney → PKT Paris → PKT Berlin → PKT Singapore → PKT Los Angeles → PKT Toronto → PKT