Convert IRST to AEDT
AEDT is 7 hours 30 minutes ahead of IRST. IRST is UTC+3:30 and AEDT is UTC+11.
Right now: IRST · AEDT
Best time to schedule a meeting
Standard 9–5 working hours overlap for 1 hour: 9:00 AM–10:00 AM IRST (4:00 PM–5:00 PM AEDT). Schedule meetings inside that window.
| IRST | AEDT | Suitable? |
|---|---|---|
| 9:00 AM | 4:30 PM | working hours |
| 10:00 AM | 5:30 PM | outside 9–5 |
| 11:00 AM | 6:30 PM | outside 9–5 |
| 12:00 PM | 7:30 PM | outside 9–5 |
| 1:00 PM | 8:30 PM | outside 9–5 |
| 2:00 PM | 9:30 PM | outside 9–5 |
| 3:00 PM | 10:30 PM | outside 9–5 |
| 4:00 PM | 11:30 PM | outside 9–5 |
| 5:00 PM | 12:30 AM (next day) | outside 9–5 |
IRST to AEDT conversion table
| IRST | AEDT |
|---|---|
| 12:00 AM | 7:30 AM |
| 1:00 AM | 8:30 AM |
| 2:00 AM | 9:30 AM |
| 3:00 AM | 10:30 AM |
| 4:00 AM | 11:30 AM |
| 5:00 AM | 12:30 PM |
| 6:00 AM | 1:30 PM |
| 7:00 AM | 2:30 PM |
| 8:00 AM | 3:30 PM |
| 9:00 AM | 4:30 PM |
| 10:00 AM | 5:30 PM |
| 11:00 AM | 6:30 PM |
| 12:00 PM | 7:30 PM |
| 1:00 PM | 8:30 PM |
| 2:00 PM | 9:30 PM |
| 3:00 PM | 10:30 PM |
| 4:00 PM | 11:30 PM |
| 5:00 PM | 12:30 AM (next day) |
| 6:00 PM | 1:30 AM (next day) |
| 7:00 PM | 2:30 AM (next day) |
| 8:00 PM | 3:30 AM (next day) |
| 9:00 PM | 4:30 AM (next day) |
| 10:00 PM | 5:30 AM (next day) |
| 11:00 PM | 6:30 AM (next day) |
About IRST
Iran Standard Time (IRST) is UTC+3:30. It is used in Iran, all year.
Iran Standard Time is UTC+3:30. Iran ran daylight saving for decades and stopped in 2022, so material written before then puts the country half an hour further ahead in summer and is now wrong. Half-hour offsets are rare enough that scheduling tools sometimes round them, which turns a correct calculation into a thirty-minute error.
About AEDT
Australian Eastern Daylight Time (AEDT) is UTC+11. It is used in Sydney and Melbourne from October to April.
Australian Eastern Daylight Time is UTC+11, the summer clock for Sydney, Melbourne and Canberra — and summer here means October to April, the opposite half of the year from the northern hemisphere. That inversion is what makes Australia–Europe scheduling awkward: for a few weeks each spring and autumn the two regions are shifting in opposite directions, and the offset between them changes twice within a month.
Does this gap change with the seasons?
This gap is seasonal. The abbreviations themselves are fixed offsets, but the region on AEDT switches to AEST (UTC+10) from April to October. So the 7.5-hour figure on this page is correct for the part of the year when both places are actually on these abbreviations, and changes by an hour outside it.
IRST does not shift, so the whole change comes from one side. A recurring meeting fixed in IRST will appear to move by an hour for everyone on the other side, twice a year, without anyone changing anything.
This is the reason scheduling systems store an IANA zone such as Region/City rather than an offset or an abbreviation: the zone knows its own rules and the offset does not.
Frequently asked questions
What time is 9:00 AM IRST in AEDT?
9:00 AM IRST is 4:30 PM AEDT.
Is AEDT ahead of IRST?
AEDT is 7 hours 30 minutes ahead of IRST.
Which time zone does this use?
IRST is UTC+3:30 and AEDT is UTC+11. Both abbreviations denote a single fixed offset, so this conversion never shifts with daylight saving — what changes is which abbreviation a place is using at the time.