PST to BST Converter
Convert time between Pacific Standard Time (PST) and British Summer Time (BST)
Pacific Standard Time (PST)
British Summer Time (BST)
Time Difference
British Summer Time (BST) is 0 hours ahead of Pacific Standard Time (PST)
Select Date
Select Time
Quick Reference
| PST | BST |
|---|---|
| 18:00 | 02:00 |
| 20:00 | 04:00 |
| 22:00 | 06:00 |
| 00:00 | 08:00 |
| 02:00 | 10:00 |
| 04:00 | 12:00 |
| 06:00 | 14:00 |
| 08:00 | 16:00 |
| 10:00 | 18:00 |
| 12:00 | 20:00 |
| 14:00 | 22:00 |
| 16:00 | 00:00 |
Top 10 Most Common Time Zones
| Abbreviation | Full Name | UTC Offset | Typical Use |
|---|---|---|---|
| UTC | Coordinated Universal Time | UTC ±0 | Global reference standard (servers, logs, APIs) |
| EST / EDT | Eastern (US) Time | UTC −5 / −4 | New York, Toronto — North American business hub |
| CST / CDT | Central (US) Time | UTC −6 / −5 | Chicago, Dallas — US central business region |
| PST / PDT | Pacific (US) Time | UTC −8 / −7 | San Francisco, Los Angeles — tech industry standard |
| GMT / BST | Greenwich Mean / British Summer Time | UTC 0 / +1 | UK, used globally as a reference with UTC |
| CET / CEST | Central European (Summer) Time | UTC +1 / +2 | Paris, Berlin, Amsterdam — EU business core |
| IST | India Standard Time | UTC +5:30 | India — major IT & outsourcing region |
| CST | China Standard Time | UTC +8 | Beijing, Shanghai — East Asia business hub |
| JST | Japan Standard Time | UTC +9 | Tokyo — finance & tech hub |
| AEST / AEDT | Australian Eastern (Daylight) Time | UTC +10 / +11 | Sydney, Melbourne — APAC regional business |
Why Time Zone Abbreviations Are Ambiguous
Unlike standardized identifiers (like America/New_York or Europe/London from the IANA tz database), abbreviations such as "CST" or "IST" are not globally unique. They can refer to different time zones depending on context — country, region, or even time of year (due to daylight saving time).
Common Ambiguous Time Zone Abbreviations
| Abbrev. | Common Meaning(s) | UTC Offset | Region(s) |
|---|---|---|---|
| CST | Central Standard Time / China Standard Time / Cuba Standard Time | UTC−6 / UTC+8 / UTC−5 | North America, China, Cuba |
| IST | Indian Standard Time / Irish Standard Time / Israel Standard Time | UTC+5:30 / UTC+1 / UTC+2 | India, Ireland, Israel |
| AST | Atlantic Standard Time / Arabia Standard Time | UTC−4 / UTC+3 | Caribbean, Canada, Middle East |
| PST | Pacific Standard Time / Philippine Standard Time | UTC−8 / UTC+8 | North America, Philippines |
| EST | Eastern Standard Time (North America / Australia) | UTC−5 / UTC+10 | North America, Australia |
✅ Best Practice
To avoid ambiguity, always:
- Use IANA tz identifiers — e.g.,
America/New_Yorkinstead of "EST" - Specify UTC offset explicitly — e.g.,
UTC−5when abbreviations must be used - Include the full timezone name — e.g., "Eastern Standard Time (EST)" with UTC offset
Related Time Zone Conversions
About PST to BST Time Conversion
Converting time between Pacific Standard Time (PST) and British Summer Time (BST) is essential for US West Coast to UK coordination during daylight saving time. PST is UTC-8 while BST is UTC+1, making BST 9 hours ahead of PST. However, since this conversion involves daylight saving time on both sides, the actual difference can vary.
This conversion is crucial during spring and summer months (late March to late October) when the UK observes British Summer Time. Whether you're scheduling business meetings, coordinating project deadlines, or planning travel, our accurate IANA-based converter ensures precise timezone calculations.
Common Use Cases for PST to BST Conversion
Business & Work
- Scheduling US West Coast to UK business meetings during summer months
- Coordinating Silicon Valley and London tech operations in daylight saving season
- Managing global business operations during summer daylight saving periods
Personal & Travel
- Planning travel from US West Coast to UK during summer
- Coordinating with UK family and friends from West Coast during BST period
- Scheduling virtual events for US West Coast-UK audiences in summer
Time Zone Information
Pacific Standard Time (PST)
- UTC Offset: UTC-8
- IANA Timezone: America/Los_Angeles
- Daylight Saving: First Sunday in November to Second Sunday in March
- Major Cities: Los Angeles, San Francisco, Seattle, Portland, San Diego
- Coverage: Pacific Coast of United States and Canada
British Summer Time (BST)
- UTC Offset: UTC+1
- IANA Timezone: Europe/London
- Daylight Saving: Last Sunday in March to Last Sunday in October
- Major Cities: London, Edinburgh, Cardiff, Belfast, Dublin
- Coverage: United Kingdom and Ireland (during daylight saving time)
Quick Reference: PST to BST
Remember: BST is always 9 hours ahead of PST
Frequently Asked Questions
What is the time difference between PST and BST?
Pacific Standard Time (PST) is UTC-8, while British Summer Time (BST) is UTC+1. BST is 9 hours ahead of PST. This means when it's noon (12:00 PM) in PST, it's 9:00 PM (21:00) the same day in BST.
When is BST observed and how does it affect the conversion?
British Summer Time (BST) is observed from the last Sunday in March to the last Sunday in October. During this period, GMT transitions to BST, adding 1 hour. Meanwhile, PST becomes PDT (UTC-7) from the second Sunday in March to the first Sunday in November. The time difference can vary between 7 and 9 hours depending on overlapping daylight saving transitions.
Should I use PST to BST or PST to GMT converter?
Use PST to BST converter if you're coordinating during UK summer months (late March to late October). Use PST to GMT converter for UK winter months (late October to late March). Always verify the current date to determine which converter is appropriate for your needs.
What major cities observe PST and BST?
PST covers major US West Coast cities like Los Angeles, San Francisco, Seattle, San Diego, and Portland. BST covers UK cities including London, Edinburgh, Cardiff, Belfast, and Dublin, as well as Ireland. These locations follow daylight saving time transitions on their respective dates.
How do I convert PST to BST manually?
To convert from PST to BST, add 9 hours to the PST time. For example, if it's 10:00 AM PST, it would be 7:00 PM BST the same day. Remember to account for daylight saving time transitions, which can change the difference to 7, 8, or 9 hours depending on the time of year.
What's the best time for PST to BST business meetings during summer?
The most practical meeting times are 8:00 AM - 10:00 AM PST (5:00 PM - 7:00 PM BST) for late afternoon UK meetings. Early morning PST times (6:00 AM - 7:00 AM) correspond to evening UK times (3:00 PM - 4:00 PM BST). Always confirm the current daylight saving time status to avoid scheduling conflicts.
Pro Tips
- • BST is 9 hours ahead of PST during summer months when both regions observe daylight saving time.
- • The UK observes BST from last Sunday in March to last Sunday in October; the US West Coast uses PDT from second Sunday in March to first Sunday in November.
- • There's a brief period in late March and late October when daylight saving time transitions don't align - always verify the exact dates.
- • Morning hours (8-10 AM PST) work best for PST-BST meetings during summer, corresponding to late afternoon in the UK.
- • Use 24-hour time format when scheduling across time zones to avoid confusion during daylight saving transitions.
- • Tech companies working with London offices during summer months typically schedule standups at 8 AM PST (5 PM BST) as a standard meeting time.