Convert Pacific Daylight Time to Greenwich Mean Time (PDT to GMT)

Understanding PDT and GMT Time Zones

Pacific Daylight Time (PDT)

Pacific Daylight Time is observed in undefined and uses the offset UTC-7. Major cities in this time zone include Los Angeles, San Francisco, Seattle, Portland. This time zone serves a significant global region with important economic and cultural hubs.

Greenwich Mean Time (GMT)

Greenwich Mean Time operates at UTC+0, covering undefined. Key cities include London, Dublin, Lisbon. The 7-hour forward offset from PDT means that when professionals in Los Angeles start their workday at 9:00 AM, it is already 4:00 PM in London.

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

Complete PDT to GMT Conversion Table

The table below shows every two-hour increment converted from Pacific Daylight Time to Greenwich Mean 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 PDT and GMT

For business scheduling, the optimal overlap window between PDT and GMT falls roughly between 9:00 AM and 10:00 AM PDT. This ensures both Los Angeles and London teams are within standard working hours.

The significant 7-hour gap between PDT and GMT 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 Los Angeles and London

Travelers flying from Los Angeles to London should adjust their sleep schedule 7 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 7-hour shift between PDT and GMT, 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 PDT to GMT conversion specifically: PDT (UTC-7) and GMT (UTC+0) 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