Convert time from BST to AST. Enter any time to see the equivalent AST time, compare current BST and AST times side by side, and find overlapping business hours for calls and meetings.
Use this BST to AST converter to compare United Kingdom and Canada time, check the 5 hours gap, and confirm the right slot for calls, handoffs, and deadlines. Good overlap starts around 2:00 PM BST / 9:00 AM AST.
Converting between British Summer Time and Atlantic Standard Time means accounting for a 5 hours gap — here's how to do it in under 10 seconds with no sign-up.
Pick the date and time in British Summer Time (UTC +1) that you want to convert. Hit "Now" to load the current bst time instantly, or use "+1h" to step forward and compare.
The equivalent Atlantic Standard Time (UTC -4) time appears immediately. Since ast is 5 hours behind of bst, most daytime conversions stay on the same calendar day.
Click "Copy Time" to grab the ast result for your calendar or message. Use "+1d" to check how the conversion shifts across dates — useful when Daylight Saving Time changes the gap.
When someone in United Kingdom suggests 2:00 PM bst, that's 9:00 AM ast. This converter shows the overlap so both sides agree on one slot — no back-and-forth.
Late-night bst times can land on a different date in ast because of the 5 hours offset. The converter labels "next day" or "previous day" next to the result so you never send a message a day early or miss a deadline.
Daylight Saving adjustments can widen or narrow the bst–ast gap by an hour. During transition weeks many people get it wrong. This converter pulls the current UTC offsets automatically, so the result is right even on the changeover day.
Product launches, sports matches, and webinars are often announced in bst. Convert the event time to ast so you know exactly when to tune in — with a 5 hours difference, a morning event in United Kingdom falls during work hours in Canada.
Quick-reference conversion table covering every hour of the day at a glance.
British Summer Time to Atlantic Standard Time full day schedule
| British Summer Time | Atlantic Standard Time |
|---|---|
| 12:00 AM |
7:00 PM
(previous day)
|
| 1:00 AM |
8:00 PM
(previous day)
|
| 2:00 AM |
9:00 PM
(previous day)
|
| 3:00 AM |
10:00 PM
(previous day)
|
| 4:00 AM |
11:00 PM
(previous 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
|
| 10:00 AM |
5:00 AM
|
| 11:00 AM |
6:00 AM
|
| 12:00 PM |
7:00 AM
|
| 1:00 PM |
8:00 AM
|
| 2:00 PM |
9:00 AM
|
| 3:00 PM |
10:00 AM
|
| 4:00 PM |
11:00 AM
|
| 5:00 PM |
12:00 PM
|
| 6:00 PM |
1:00 PM
|
| 7:00 PM |
2:00 PM
|
| 8:00 PM |
3:00 PM
|
| 9:00 PM |
4:00 PM
|
| 10:00 PM |
5:00 PM
|
| 11:00 PM |
6:00 PM
|
UK / Ireland summer offset (last Sunday of March to last Sunday of October) — UTC+1, same as CET. During BST, London aligns with continental European working hours rather than the standard 1-hour gap. Winter reverts to GMT (UTC+0).
Explore more bst conversions for major business and travel corridors. Each page includes a 24-hour chart, time difference summary, and meeting overlap guidance.
Find the time difference from any major zone into Atlantic Standard Time. Use these pages when scheduling with Canada from a different region.
