IRST to AST Time Converter
Convert time from IRST to AST. Enter any time to see the equivalent AST time, compare current IRST and AST times side by side, and find overlapping business hours for calls and meetings.
irst to ast Quick Facts
Use this IRST to AST converter to compare Iran and Canada time, check the 7 hours and 30 minutes gap, and confirm the right slot for calls, handoffs, and deadlines. Good overlap starts around 5:00 PM IRST / 9:30 AM AST.
How to Convert irst to ast
Converting between Iran Standard Time and Atlantic Standard Time means accounting for a 7 hours and 30 minutes gap — here's how to do it in under 10 seconds with no sign-up.
Pick the date and time in Iran Standard Time (UTC +3:30) that you want to convert. Hit "Now" to load the current irst time instantly, or use "+1h" to step forward and compare.
The equivalent Atlantic Standard Time (UTC -4) time appears immediately. Since ast is 7 hours and 30 minutes behind of irst, 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 irst to ast Converter
When someone in Iran suggests 5:00 PM irst, that's 9:30 AM ast. This converter shows the overlap so both sides agree on one slot — no back-and-forth.
Late-night irst times can land on a different date in ast because of the 7 hours and 30 minutes 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.
The half-hour offset between irst (UTC +3:30) and ast (UTC -4) already makes mental math tricky — add Daylight Saving Time and the gap can shift further. This converter uses live UTC offsets, so you're always accurate.
Product launches, sports matches, and webinars are often announced in irst. Convert the event time to ast so you know exactly when to tune in — with a 7 hours and 30 minutes difference, a morning event in Iran hits the evening in Canada.
irst to ast Time Conversion Chart
Quick-reference conversion table covering every hour of the day at a glance.
Iran Standard Time to Atlantic Standard Time full day schedule
| Iran Standard Time | Atlantic Standard Time |
|---|---|
| 12:00 AM |
4:30 PM
(previous day)
|
| 1:00 AM |
5:30 PM
(previous day)
|
| 2:00 AM |
6:30 PM
(previous day)
|
| 3:00 AM |
7:30 PM
(previous day)
|
| 4:00 AM |
8:30 PM
(previous day)
|
| 5:00 AM |
9:30 PM
(previous day)
|
| 6:00 AM |
10:30 PM
(previous day)
|
| 7:00 AM |
11:30 PM
(previous day)
|
| 8:00 AM |
12:30 AM
|
| 9:00 AM |
1:30 AM
|
| 10:00 AM |
2:30 AM
|
| 11:00 AM |
3:30 AM
|
| 12:00 PM |
4:30 AM
|
| 1:00 PM |
5:30 AM
|
| 2:00 PM |
6:30 AM
|
| 3:00 PM |
7:30 AM
|
| 4:00 PM |
8:30 AM
|
| 5:00 PM |
9:30 AM
|
| 6:00 PM |
10:30 AM
|
| 7:00 PM |
11:30 AM
|
| 8:00 PM |
12:30 PM
|
| 9:00 PM |
1:30 PM
|
| 10:00 PM |
2:30 PM
|
| 11:00 PM |
3:30 PM
|
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