BST to EDT Time Converter
Convert British Summer Time (BST) to Eastern Daylight Time (EDT) with precision. BST runs 5 hours ahead of EDT, making scheduling between the UK and North America straightforward once you know the offset.
Quick Conversions
BST to EDT Conversion Table
This table shows the time difference between British Summer Time and Eastern Daylight Time throughout the day. Each BST time corresponds to a time 5 hours earlier in EDT.
| British Summer Time (BST) | Eastern Daylight Time (EDT) |
|---|---|
| 00:00 (Midnight) | 19:00 (7:00 PM, previous day) |
| 01:00 | 20:00 (8:00 PM, previous day) |
| 02:00 | 21:00 (9:00 PM, previous day) |
| 03:00 | 22:00 (10:00 PM, previous day) |
| 04:00 | 23:00 (11:00 PM, previous day) |
| 05:00 | 00:00 (Midnight) |
| 06:00 | 01:00 |
| 07:00 | 02:00 |
| 08:00 | 03:00 |
| 09:00 | 04:00 |
| 10:00 | 05:00 |
| 11:00 | 06:00 |
| 12:00 (Noon) | 07:00 |
| 13:00 (1:00 PM) | 08:00 |
| 14:00 (2:00 PM) | 09:00 |
| 15:00 (3:00 PM) | 10:00 |
| 16:00 (4:00 PM) | 11:00 |
| 17:00 (5:00 PM) | 12:00 (Noon) |
| 18:00 (6:00 PM) | 13:00 (1:00 PM) |
| 19:00 (7:00 PM) | 14:00 (2:00 PM) |
| 20:00 (8:00 PM) | 15:00 (3:00 PM) |
| 21:00 (9:00 PM) | 16:00 (4:00 PM) |
| 22:00 (10:00 PM) | 17:00 (5:00 PM) |
| 23:00 (11:00 PM) | 18:00 (6:00 PM) |
How to Convert BST to EDT
Converting between these time zones requires subtracting 5 hours from BST to get EDT. The formula works because BST operates at UTC+1 whilst EDT runs at UTC-4.
Conversion Steps
- Take your current BST time
- Subtract 5 hours from the time
- If the result goes below 00:00, subtract one day and add 24 hours
- The result is your EDT time
For example, if it’s 15:30 BST, subtract 5 hours to get 10:30 EDT. If it’s 03:00 BST, subtracting 5 hours gives you 22:00 EDT on the previous day.
Important Note: This conversion only applies when both regions observe their respective daylight saving times. BST runs from the last Sunday in March to the last Sunday in October, whilst EDT operates from the second Sunday in March to the first Sunday in November.
Business Hours Overlap
When scheduling meetings between the UK and eastern North America, finding overlapping business hours matters. Standard working hours in the UK (09:00–17:00 BST) overlap with North American hours as follows:
| UK Business Hours (BST) | North America (EDT) | Suitable For |
|---|---|---|
| 09:00–13:00 | 04:00–08:00 | Early birds only |
| 13:00–17:00 | 08:00–12:00 | Morning meetings |
| 14:00–18:00 | 09:00–13:00 | Ideal overlap window |
| 17:00–21:00 | 12:00–16:00 | UK evenings, US afternoons |
The sweet spot for transatlantic calls sits between 14:00–17:00 BST (09:00–12:00 EDT). Both sides operate within normal working hours, making it the most productive window for collaboration.
Time Zones Explained
British Summer Time (BST)
British Summer Time represents the UK’s daylight saving time from late March to late October. During this period, clocks move forward one hour from Greenwich Mean Time (GMT), creating UTC+1. The UK introduced this system in 1916 to save energy during World War I, and it’s remained in place ever since.
BST begins at 01:00 GMT on the last Sunday of March, when clocks spring forward to 02:00. It ends at 02:00 BST on the last Sunday of October, when clocks fall back to 01:00 GMT. The entire UK—England, Scotland, Wales, and Northern Ireland—observes BST simultaneously.
Eastern Daylight Time (EDT)
Eastern Daylight Time serves the eastern coast of North America during spring and summer months. It runs from the second Sunday in March to the first Sunday in November, sitting at UTC-4. Major cities in this zone include New York, Toronto, Montreal, Boston, Philadelphia, Washington DC, Miami, and Atlanta.
EDT covers 17 US states entirely, plus portions of several others. In Canada, it includes Ontario, Quebec, and parts of Nunavut. The time zone affects roughly 150 million people across North America.
When These Time Zones Don’t Align
BST and EDT don’t always run simultaneously. The dates when each begins and ends differ, creating brief periods with different time differences:
- Early March to late March: The UK uses GMT whilst the US uses EDT, creating a 4-hour difference instead of 5
- Late October to early November: The UK switches to GMT whilst the US still uses EDT, again creating a 4-hour gap
- November to March: Neither zone observes daylight saving, so GMT and EST create a 5-hour difference
Always double-check the dates during March, October, and November when scheduling international calls. The clock changes don’t happen simultaneously, which can catch people off guard.
Common Scenarios
Morning Calls
A 09:00 meeting in London translates to 04:00 in New York—far too early for most. Starting at 14:00 BST (09:00 EDT) works better, giving both sides a reasonable start to their working day.
Afternoon Collaboration
If your New York colleagues want to chat at 14:00 their time, you’re looking at 19:00 BST. That’s after hours for UK staff, though it might work for urgent matters or flexible teams.
Global Events
Webinars and online events often target both time zones. A 17:00 BST start catches Londoners at the end of their day and New Yorkers at lunch (12:00 EDT). A 18:00 BST start (13:00 EDT) lets UK participants join from home whilst keeping North Americans in early afternoon.