Convert time from AST to BST. Enter any time to see the equivalent BST time, compare current AST and BST times side by side, and find overlapping business hours for calls and meetings.
Use this AST to BST converter to compare Canada and United Kingdom time, check the 5 hours gap, and confirm the right slot for calls, handoffs, and deadlines. Good overlap starts around 9:00 AM AST / 2:00 PM BST.
Converting between Atlantic Standard Time and British Summer 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 Atlantic Standard Time (UTC -4) that you want to convert. Hit "Now" to load the current ast time instantly, or use "+1h" to step forward and compare.
The equivalent British Summer Time (UTC +1) time appears immediately. Since bst is 5 hours ahead of ast, most daytime conversions stay on the same calendar day.
Click "Copy Time" to grab the bst 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 Canada suggests 9:00 AM ast, that's 2:00 PM bst. This converter shows the overlap so both sides agree on one slot — no back-and-forth.
Late-night ast times can land on a different date in bst 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 ast–bst 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 ast. Convert the event time to bst so you know exactly when to tune in — with a 5 hours difference, a morning event in Canada falls during work hours in United Kingdom.
Quick-reference conversion table covering every hour of the day at a glance.
Atlantic Standard Time to British Summer Time full day schedule
| Atlantic Standard Time | British Summer Time |
|---|---|
| 12:00 AM |
5:00 AM
|
| 1:00 AM |
6:00 AM
|
| 2:00 AM |
7:00 AM
|
| 3:00 AM |
8:00 AM
|
| 4:00 AM |
9:00 AM
|
| 5:00 AM |
10:00 AM
|
| 6:00 AM |
11:00 AM
|
| 7:00 AM |
12:00 PM
|
| 8:00 AM |
1:00 PM
|
| 9:00 AM |
2:00 PM
|
| 10:00 AM |
3:00 PM
|
| 11:00 AM |
4:00 PM
|
| 12:00 PM |
5:00 PM
|
| 1:00 PM |
6:00 PM
|
| 2:00 PM |
7:00 PM
|
| 3:00 PM |
8:00 PM
|
| 4:00 PM |
9:00 PM
|
| 5:00 PM |
10:00 PM
|
| 6:00 PM |
11:00 PM
|
| 7:00 PM |
12:00 AM
(next day)
|
| 8:00 PM |
1:00 AM
(next day)
|
| 9:00 PM |
2:00 AM
(next day)
|
| 10:00 PM |
3:00 AM
(next day)
|
| 11:00 PM |
4:00 AM
(next day)
|
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 ast 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 British Summer Time. Use these pages when scheduling with United Kingdom from a different region.
