BST to PDT Time Converter

Converting between British Summer Time and Pacific Daylight Time is essential when scheduling calls or meetings across the UK and North America’s West Coast. BST runs 8 hours ahead of PDT, which means when it’s midday in London, it’s only 4am in Los Angeles [web:1][web:5].

Quick Conversions

BST to PDT Conversion Table

This table shows the time difference between British Summer Time and Pacific Daylight Time throughout the day. BST is 8 hours ahead, so when planning calls or meetings, you’ll need to account for this significant gap [web:1].

BST (UTC+1) PDT (UTC-7) Next Day
00:00 (Midnight) 16:00 (4pm) Previous Day
01:00 17:00 (5pm) Previous Day
02:00 18:00 (6pm) Previous Day
03:00 19:00 (7pm) Previous Day
04:00 20:00 (8pm) Previous Day
05:00 21:00 (9pm) Previous Day
06:00 22:00 (10pm) Previous Day
07:00 23:00 (11pm) Previous Day
08:00 00:00 (Midnight) Same Day
09:00 01:00 Same Day
10:00 02:00 Same Day
11:00 03:00 Same Day
12:00 (Noon) 04:00 Same Day
13:00 05:00 Same Day
14:00 06:00 Same Day
15:00 07:00 Same Day
16:00 08:00 Same Day
17:00 09:00 Same Day
18:00 10:00 Same Day
19:00 11:00 Same Day
20:00 12:00 (Noon) Same Day
21:00 13:00 Same Day
22:00 14:00 Same Day
23:00 15:00 Same Day

How the Conversion Works

The conversion between BST and PDT follows a straightforward formula. BST operates at UTC+1, whilst PDT runs at UTC-7. This creates an 8-hour time difference, with BST always ahead [web:1][web:5].

Conversion Formula: PDT Time = BST Time – 8 hours

When converting, remember that subtracting 8 hours from BST times before 8am will push you into the previous day. For instance, 3am BST becomes 7pm PDT the day before. After 8am BST, both time zones share the same calendar date.

Step-by-Step Conversion

  • Start with your BST time
  • Subtract 8 hours from the hour value
  • If the result is negative, add 24 hours and move back one day
  • Keep minutes and seconds unchanged

When to Schedule Meetings

Finding a suitable meeting time between the UK and North America’s West Coast requires careful planning. The 8-hour gap means your working hours barely overlap with theirs [web:1].

Best for UK Callers

Schedule calls between 5pm and 7pm BST. This converts to 9am-11am PDT, catching North Americans at the start of their working day whilst you’re wrapping up yours.

Best for PDT Callers

Ring between 8am and 10am PDT. This converts to 4pm-6pm BST, giving UK colleagues time to prepare before they finish for the day.

About These Time Zones

British Summer Time (BST)

British Summer Time is the UK’s daylight saving time, running from the last Sunday in March through to the last Sunday in October. It sits one hour ahead of Greenwich Mean Time (GMT) at UTC+1 [web:1][web:6].

The UK switches to BST to make better use of daylight during spring and summer months. England, Wales, Scotland, Northern Ireland, and the Crown Dependencies all observe BST. During winter, the UK reverts to GMT [web:6].

Pacific Daylight Time (PDT)

Pacific Daylight Time is observed in western North America during the warmer months. It runs from the second Sunday in March until the first Sunday in November, sitting at UTC-7 [page:1].

Major cities on PDT include Los Angeles, Vancouver, San Diego, Seattle, and Portland. When PDT ends, these regions switch to Pacific Standard Time (PST) at UTC-8, creating a 9-hour difference with GMT [page:1].

Day-to-Day Examples

Here are some common scenarios that show how the time difference affects daily life:

  • Morning meetings: A 9am call in London means your Los Angeles colleagues join at 1am – not ideal for them
  • Afternoon collaboration: 3pm BST converts to 7am PDT, catching West Coast teams as they start work
  • Evening calls: 6pm BST equals 10am PDT, giving both sides comfortable working hours
  • Late working: 8pm BST becomes noon PDT, perfect for urgent matters but disrupts UK work-life balance

FAQs

What’s the time difference between BST and PDT?
BST is 8 hours ahead of PDT. When it’s noon in London, it’s 4am in Los Angeles.
Does the time difference between BST and PDT change?
The 8-hour gap remains constant whilst both regions observe daylight saving. However, the UK and North America switch their clocks on different dates, briefly creating a 7 or 9-hour difference during transition periods.
When does BST start and end?
BST begins on the last Sunday in March when clocks move forward one hour. It ends on the last Sunday in October when clocks move back to GMT.
When does PDT start and end?
PDT starts on the second Sunday in March and ends on the first Sunday in November. Outside these dates, the region observes Pacific Standard Time (PST).
Which cities use PDT?
Los Angeles, San Francisco, Seattle, Portland, San Diego, Las Vegas, and Vancouver all use PDT during daylight saving months.
What’s the best time for video calls between UK and West Coast USA?
Between 5pm and 7pm BST works well, converting to 9am-11am PDT. This catches Pacific time zones at the start of their day whilst UK participants are near the end of theirs.
How do I avoid confusion when converting BST to PDT?
Always remember that BST is ahead. Simply subtract 8 hours from your BST time. If you’re converting a time before 8am BST, the PDT time will fall on the previous day.
Do all of California and British Columbia use PDT?
Most of California and British Columbia’s populated areas use PDT, but some remote regions in these provinces may use different time zones.

Related Time Conversions

If you work across multiple time zones, these related conversions might prove handy:

From To Difference
BST EDT (Eastern Daylight Time) 5 hours
BST CDT (Central Daylight Time) 6 hours
BST MDT (Mountain Daylight Time) 7 hours
BST AEST (Australian Eastern Standard) -9 hours
GMT PST (Pacific Standard Time) 8 hours
BST CET (Central European Time) -1 hour

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