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

Understanding GMT and PDT 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 Daylight Time (PDT)

Pacific Daylight Time operates at UTC-7, covering undefined. Key cities include Los Angeles, San Francisco, Seattle, Portland. The 7-hour backward offset from GMT means that when professionals in London start their workday at 9:00 AM, it is already 2:00 AM in Los Angeles.

GMT is also commonly referred to as London time, UK time, British time, England time. PDT is also known as Pacific Time, Pacific Daylight, 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 PDT.

Complete GMT to PDT Conversion Table

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

Remote teams spanning London and Los Angeles often adopt asynchronous practices to bridge the 7-hour gap. Tools like Slack, Loom, and Notion reduce the need for real-time overlap while keeping projects moving forward.

The significant 7-hour gap between GMT and PDT 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

When arriving in Los Angeles from London, immediately set all devices to local time. Exposure to natural daylight at the destination helps reset your circadian rhythm. Westbound travelers should seek afternoon light.

Medical experts recommend allowing approximately one day of adjustment per hour of time difference. For the 7-hour shift between GMT and PDT, plan for roughly one week of gradual adjustment for optimal performance.

Daylight Saving Time Considerations

Keep in mind that DST transition dates differ between regions. The US changes clocks in March and November, Europe in March and October, and Australia in April and October. This can cause temporary shifts in conversion results.

For the GMT to PDT conversion specifically: GMT (UTC+0) and PDT (UTC-7) 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