BST to EDT Time Converter
EDT is 5 hours behind BST. BST is UTC+1:00, and EDT is UTC-4:00.
Best Time to Call Between BST and EDT
Both zones are inside normal business hours between 2:00 PM and 5:00 PM BST — that's 9:00 AM to 12:00 PM EDT. That's a 3-hour window.
both at work BST only EDT only neither — hours along the strip are BST.
Common Times Converted
BST on the left, EDT on the right.
BST to EDT: Full 24-Hour Conversion Table
Shaded rows are working hours; the darker shade marks the hours when both zones are at work.
| BST | EDT | Working hours |
|---|---|---|
| 12:00 AM | 7:00 PM prev day | — |
| 1:00 AM | 8:00 PM prev day | — |
| 2:00 AM | 9:00 PM prev day | — |
| 3:00 AM | 10:00 PM prev day | — |
| 4:00 AM | 11:00 PM prev day | — |
| 5:00 AM | 12:00 AM | — |
| 6:00 AM | 1:00 AM | — |
| 7:00 AM | 2:00 AM | — |
| 8:00 AM | 3:00 AM | — |
| 9:00 AM | 4:00 AM | BST only |
| 10:00 AM | 5:00 AM | BST only |
| 11:00 AM | 6:00 AM | BST only |
| 12:00 PM | 7:00 AM | BST only |
| 1:00 PM | 8:00 AM | BST only |
| 2:00 PM | 9:00 AM | Both zones |
| 3:00 PM | 10:00 AM | Both zones |
| 4:00 PM | 11:00 AM | Both zones |
| 5:00 PM | 12:00 PM | EDT only |
| 6:00 PM | 1:00 PM | EDT only |
| 7:00 PM | 2:00 PM | EDT only |
| 8:00 PM | 3:00 PM | EDT only |
| 9:00 PM | 4:00 PM | EDT only |
| 10:00 PM | 5:00 PM | — |
| 11:00 PM | 6:00 PM | — |
What BST and EDT Actually Are
BST — British Summer Time
London, Manchester, Birmingham, Glasgow, and the rest of the UK from late March to late October. Standing at UTC+1:00 as written, and the region does change its clocks, so its live offset moves by an hour twice a year. The next change is on Sunday, October 25, 2026, to GMT. BST also stands for Bangladesh Standard Time (UTC+6). BDT is the clearer label for that one.
British Summer Time began in 1916 as a wartime fuel-saving measure and has run every year since, making it one of the oldest continuous daylight saving schemes in the world.
EDT — Eastern Daylight Time
New York, Toronto, Washington DC, Atlanta, Miami, Boston. Standing at UTC-4:00 as written, and the region does change its clocks, so its live offset moves by an hour twice a year. The next change is on Sunday, November 1, 2026, to EST.
EDT runs from the second Sunday in March to the first Sunday in November — about eight months, making the "daylight" version the majority of the year rather than the exception.
What This Means in Practice
Both sides change clocks, on different dates
Both regions observe daylight saving but do not switch on the same day, so for a week or two each spring and fall the gap between them is an hour different from the rest of the year. Those short windows are where recurring invitations quietly break.
Major Cities in Each Zone
Cities on BST
Cities on EDT
Frequently Asked Questions
What is the time difference between BST and EDT?
EDT is 5 hours behind BST.
What is 9:00 AM BST in EDT?
9:00 AM BST is 4:00 AM EDT.
What are the best hours to schedule a call between BST and EDT?
Between 2:00 PM and 5:00 PM BST, which is 9:00 AM to 12:00 PM EDT. Both sides are inside normal business hours through that window.
Does the difference between BST and EDT change during the year?
Yes. Both regions observe daylight saving, and they do not switch on the same dates, so the gap shifts by an hour at least twice a year. The next clock change is on Sunday, October 25, 2026.
Does BST always mean British Summer Time?
BST also stands for Bangladesh Standard Time (UTC+6). BDT is the clearer label for that one.