Convert Greenwich Mean Time to Pacific Standard Time (GMT to PST)

Understanding GMT and PST Time Zones

Greenwich Mean Time (GMT)

Greenwich Mean Time is observed in undefined and uses the offset UTC+0. Major cities in this time zone include London, Dublin, Lisbon. This time zone covers parts of Europe and/or Africa, home to major financial and cultural centers.

Pacific Standard Time (PST)

Pacific Standard Time operates at UTC-8, covering undefined. Key cities include Los Angeles, San Francisco, Seattle, Portland. The 8-hour backward offset from GMT means that when professionals in London start their workday at 9:00 AM, it is already 1:00 AM in Los Angeles.

GMT is also commonly referred to as London time, UK time, British time, England time. PST is also known as Pacific Time, PT, West Coast time, LA time, California time. So if you are searching for London time to Pacific Time, this is the same conversion as GMT to PST.

Complete GMT to PST Conversion Table

The table below shows every two-hour increment converted from Greenwich Mean Time to Pacific Standard Time. Business hours (9 AM – 5 PM) are highlighted for easy scheduling reference.

Times shown in 12-hour and 24-hour format. Last updated 2026-03-09.

Scheduling Between GMT and PST

For business scheduling, the optimal overlap window between GMT and PST falls roughly between 5:00 PM and 1:00 AM GMT. This ensures both London and Los Angeles teams are within standard working hours.

The significant 8-hour gap between GMT and PST means that finding overlapping working hours requires compromise from at least one side. Consider adopting asynchronous workflows — recorded video updates, shared documents, and time-zone-aware project management tools — to supplement the limited real-time overlap.

Travel Between London and Los Angeles

Travelers flying from London to Los Angeles should adjust their sleep schedule 8 days before departure at a rate of one hour per day. For this significant time difference, gradual adjustment reduces jet lag dramatically.

Medical experts recommend allowing approximately one day of adjustment per hour of time difference. For the 8-hour shift between GMT and PST, plan for roughly one week of gradual adjustment for optimal performance.

Daylight Saving Time Considerations

During standard time months (November through March in the US), this offset is fixed. However, if either zone observes daylight saving time, the difference may temporarily shift by one hour during transition weeks in spring and autumn.

For the GMT to PST conversion specifically: GMT (UTC+0) and PST (UTC-8) both observe DST. When both zones transition on different dates, the offset temporarily shifts by one hour for a few weeks. Always verify during March–April and October–November.

Related Time Zone Conversions

References & Resources

• TimeAndDate.com — World Time Zones
• NIST — Official US Time Standard
• IANA Time Zone Database
• Wikipedia — Time Zone Abbreviations
• WorldTimeServer — Current Times Worldwide
• Royal Observatory Greenwich

Frequently Asked Questions