UTC to AST Time Converter
Use this UTC to AST time converter to compare UTC and Canada time instantly. AST is 4 hours behind UTC, so 9:00 AM UTC becomes 5:00 AM AST and 5:00 PM UTC becomes 1:00 PM AST. The page is useful for business-hours overlap, international calls, remote-team handoffs, webinars, and travel planning, with daylight saving adjustments handled automatically.
UTC to AST Quick Facts
Use this UTC to AST converter to compare Universal and Canada time, check the 4 hours gap, and confirm the right slot for calls, handoffs, and deadlines. Good overlap starts around 1:00 PM UTC / 9:00 AM AST.
How to Convert UTC to AST
Converting between Coordinated Universal Time and Atlantic Standard Time means accounting for a 4 hours gap — here's how to do it in under 10 seconds with no sign-up.
Pick the date and time in Coordinated Universal Time (UTC +0) that you want to convert. Hit "Now" to load the current UTC time instantly, or use "+1h" to step forward and compare.
The equivalent Atlantic Standard Time (UTC -4) time appears immediately. Since AST is 4 hours behind of UTC, 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.
Why Choose Our UTC to AST Converter
When someone in Universal suggests 1:00 PM UTC, that's 9:00 AM AST. This converter shows the overlap so both sides agree on one slot — no back-and-forth.
Late-night UTC times can land on a different date in AST because of the 4 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 UTC–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 UTC. Convert the event time to AST so you know exactly when to tune in — with a 4 hours difference, a morning event in Universal falls during work hours in Canada.
UTC to AST Time Conversion Chart
Quick-reference conversion table covering every hour of the day at a glance.
Coordinated Universal Time to Atlantic Standard Time full day schedule
| Coordinated Universal Time | Atlantic Standard Time |
|---|---|
| 12:00 AM |
8:00 PM
(previous day)
|
| 1:00 AM |
9:00 PM
(previous day)
|
| 2:00 AM |
10:00 PM
(previous day)
|
| 3:00 AM |
11:00 PM
(previous day)
|
| 4:00 AM |
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
|
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Find the time difference from any major zone into Atlantic Standard Time. Use these pages when scheduling with Canada from a different region.