What is the time difference between IRST and AEST?

Australian Eastern Standard Time (AEST) is 6 hours and 30 minutes ahead of Iran Standard Time (IRST). IRST uses a UTC offset of UTC+3:30, while AEST uses UTC+10. For example, when it's 9:00 AM in IRST, it's 3:30 PM in AEST. Note that this difference may shift by one hour during daylight saving time transitions if AEST observes DST. Use the conversion table above to see the exact time for each hour of the day.

How do I convert IRST to AEST?

To convert IRST to AEST, add 6 hours and 30 minutes to the IRST time. For example, 9:00 AM IRST is 3:30 PM AEST, and 5:00 PM IRST is 11:30 PM AEST. Keep in mind that during daylight saving time transitions, the offset between these timezones may temporarily change by one hour. You can also use the interactive converter above for quick, accurate results.

What time is it in AEST when it's noon in IRST?

When it's 12:00 PM (noon) in IRST, it's 6:30 PM in AEST. This is because AEST is 6 hours and 30 minutes ahead of IRST. Similarly, when it's 6:00 PM in IRST, it's 12:30 AM in AEST. During daylight saving time transitions, these times may shift by one hour, so always verify the current offset. The color-coded conversion table above shows every hour mapped between both timezones.

How many hours ahead is AEST from IRST?

AEST is 6 hours and 30 minutes ahead of IRST. This means when it's 9:00 AM in IRST, it's 3:30 PM in AEST, and when it's midnight in IRST, it's 6:30 AM in AEST. The exact difference can vary by one hour during daylight saving time transitions. The conversion table above provides a complete hour-by-hour mapping.

Is AEST ahead or behind IRST?

AEST is ahead of IRST by 6 hours and 30 minutes. Clocks in AEST show a later time than IRST, meaning the day starts earlier in AEST relative to IRST. For example, when it's morning in IRST, it's already afternoon or evening in AEST. This gap may change by one hour during DST transitions.

Does IRST observe daylight saving time?

No, Iran Standard Time does not observe daylight saving time. The UTC offset of UTC+3:30 remains the same year-round, which simplifies time conversions. Regions using IRST keep their clocks unchanged regardless of the season.

Does AEST observe daylight saving time?

Yes, Australian Eastern Standard Time observes daylight saving time. During DST, the abbreviation changes to AEDT and clocks move forward by one hour, typically in spring. Clocks then fall back in autumn, returning to standard AEST time. This means the UTC offset for AEST shifts between two values depending on the season. Check our DST change calendar for exact transition dates that may affect your IRST to AEST conversions.

What is the best time to call from IRST to AEST?

The best time for a call between IRST and AEST is during overlapping business hours (9 AM – 5 PM) in both timezones. To reach someone in AEST during their work day, call between 2:30 AM and 10:30 AM your IRST time. Avoid calling too early or late, as the 6 hours and 30 minutes difference means your evening could be their late night. Check the color-coded conversion table above — green hours indicate business hours in both zones, making it easy to find the ideal time.

When does daylight saving time change in AEST?

Daylight saving time transitions vary by year and region. Australian Eastern Standard Time observes DST, which typically shifts clocks forward by one hour in spring ("spring forward") and back in fall ("fall back"). During these transition periods, the time difference between IRST and AEST may temporarily change by one hour, which can cause confusion for scheduled meetings or calls. It's important to double-check your conversions around transition dates, especially if the two timezones switch on different dates. Check our DST change calendar for exact transition dates in the current year.

Do IRST and AEST ever have the same time?

No, IRST and AEST never show the same time because their base UTC offsets are different. However, because AEST observes daylight saving time and IRST does not, the time difference between them changes by one hour during DST transitions. This means the gap narrows or widens depending on the season, but the two clocks never align. Always verify the current offset around DST transition dates to avoid scheduling errors.

IRST to AEST Converter

Convert Iran Standard Time to Australian Eastern Standard Time. See the hour-by-hour conversion table below.

Timezone Details

Tehran

5:03 AM

Tuesday, June 9, 2026

Tehran (UTC+03:30)

Australian Eastern Standard Time

11:33 AM

Tuesday, June 9, 2026

AEST (UTC+10:00)

Difference: +6h 30m

AEST DST: Yes (AEDT)

24-Hour Overview

Tehran — 24-hour overview

12a12a

3a3a

6a6a

9a9a

10a

11a

12p12p

3p3p

6p6p

9p9p

10p

11p

NightMorningBusinessEvening

AEST — 24-hour overview

6a6a

9a9a

10a

11a

12p12p

3p3p

6p6p

9p9p

10p

11p

12a12a

3a3a

NightMorningBusinessEvening

Frequently Asked Questions

Related Conversions

AEST to IRST GMT to AEST AEST to GMT IST to AEST AEST to IST EST to AEST AEST to EST PST to AEST AEST to PST

Cities in These Timezones

IRST Cities

Tehran

AEST Cities

Sydney Canberra

More Tools

Compare IRST & AEST Plan a Meeting (IRST & AEST)See on Map

Learn More

How Time Zones Work Understanding DST Timezone Abbreviations

External Resources

Australian Eastern Standard Time on Wikipedia IANA Time Zone Database