London PhiladelphiaTime Converter
London (BST, UTC+1) is currently 5 hours ahead of Philadelphia (EDT, UTC−4). Compare live clocks, convert any hour, and find times to meet.
Quick answer
When it's in London, it's the same day in Philadelphia.
London (GMT/BST) runs 5 hours ahead of Philadelphia (EST/EDT). Both sides keep standard office hours with a real 9–6 overlap — the highlighted window below works for everyone.
- Time difference
- −5h 00m
- London
- UTC+1
- Philadelphia
- UTC−4
- Best call window
- 2:00 PM BST
London to Philadelphia conversion table
The next 12 hours in London and the matching local time in Philadelphia. The current hour is highlighted; drag the converter's slider and the table follows.
| London · BST | Philadelphia · EDT |
|---|---|
| NOW Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Best time to meet between London & Philadelphia
Working hours are 9am–6pm in each city. The bright band is where they overlap — when both sides are at their desks.
Daylight saving shifts this gap by up to 1 hour
The difference between London and Philadelphia swings between 5 and 4 hours across the year as each side starts or ends daylight saving. Clocks in London move back 1 hour to GMT (UTC±0) on Sunday, October 25, 2026. Clocks in Philadelphia move back 1 hour to EST (UTC−5) on Sunday, November 1, 2026. This page always shows the live, DST-aware difference.
Related time zone conversions
Jump straight to another pair — every combination is a live tool, not an article.
From London
To Philadelphia
One source of truth — for you and your AI
This page exposes the same answer as structured data, so when you ask an assistant "what's 9am London time in Philadelphia?", it can cite the exact, DST-aware result — not a stale blog post.
- Schema.org JSON-LD on every converter page
- A machine-readable facts island with IANA zones and every possible offset
- Live times in <time datetime> elements with explicit UTC offsets
{
"pair": "London → Philadelphia",
"url": "https://worldclock.pro/en/convert/london-to-philadelphia",
"from": {
"name": "London",
"type": "city",
"abbreviation": "GMT",
"daylightAbbreviation": "BST",
"iana": "Europe/London",
"standardUtcOffset": "+00:00",
"daylightUtcOffset": "+01:00",
"referenceCity": "London"
},
"to": {
"name": "Philadelphia",
"type": "city",
"abbreviation": "EST",
"daylightAbbreviation": "EDT",
"iana": "America/New_York",
"standardUtcOffset": "-05:00",
"daylightUtcOffset": "-04:00",
"referenceCity": "Philadelphia"
},
"currentDifferenceMinutes": -300,
"possibleDifferencesMinutes": [
-300,
-240
],
"note": "Between the regions that use these zones the difference is 5 and 4 hours across the year, depending on daylight saving on each side. The clocks on this page show the named zones themselves, which are fixed."
}
Frequently asked questions
What is the time difference between London and Philadelphia?
London is currently 5 hours ahead of Philadelphia. London is on BST (UTC+1) and Philadelphia is on EDT (UTC−4). The difference can change when either side starts or ends daylight saving time.
Is Philadelphia ahead of or behind London?
Philadelphia is currently 5 hours behind London.
When it is 9:00 AM in London, what time is it in Philadelphia?
When it is 9:00 AM on a Monday in London, it is 4:00 AM in Philadelphia.
Do London and Philadelphia observe daylight saving time?
Clocks in London move back 1 hour to GMT (UTC±0) on Sunday, October 25, 2026. Clocks in Philadelphia move back 1 hour to EST (UTC−5) on Sunday, November 1, 2026.
How do I convert London time to Philadelphia time?
Subtract 5 hours from any time in London to get the time in Philadelphia. This page's converter and 24-hour table do it automatically and stay correct through daylight-saving changes.
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