What is the time difference between MSK and IRST?

Iran Standard Time (IRST) is 0 hours and 30 minutes ahead of Moscow Standard Time (MSK). MSK uses a UTC offset of UTC+3, while IRST uses UTC+3:30. For example, when it's 9:00 AM in MSK, it's 9:30 AM in IRST. This difference remains constant year-round since neither timezone observes daylight saving time. Use the conversion table above to see the exact time for each hour of the day.

How do I convert MSK to IRST?

To convert MSK to IRST, add 0 hours and 30 minutes to the MSK time. For example, 9:00 AM MSK is 9:30 AM IRST, and 5:00 PM MSK is 5:30 PM IRST. Since neither timezone observes DST, this conversion stays the same all year. You can also use the interactive converter above for quick, accurate results.

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

When it's 12:00 PM (noon) in MSK, it's 12:30 PM in IRST. This is because IRST is 0 hours and 30 minutes ahead of MSK. Similarly, when it's 6:00 PM in MSK, it's 6:30 PM in IRST. This relationship is constant throughout the year. The color-coded conversion table above shows every hour mapped between both timezones.

How many hours ahead is IRST from MSK?

IRST is 0 hours and 30 minutes ahead of MSK. This means when it's 9:00 AM in MSK, it's 9:30 AM in IRST, and when it's midnight in MSK, it's 12:30 AM in IRST. This offset is constant throughout the year since neither timezone uses daylight saving time. The conversion table above provides a complete hour-by-hour mapping.

Is IRST ahead or behind MSK?

IRST is ahead of MSK by 0 hours and 30 minutes. Clocks in IRST show a later time than MSK, meaning the day starts earlier in IRST relative to MSK. For example, when it's morning in MSK, it's later in the morning in IRST. This difference stays the same year-round.

Does MSK observe daylight saving time?

No, Moscow Standard Time does not observe daylight saving time. The UTC offset of UTC+3 remains the same year-round, making time conversions from MSK more predictable. Countries and regions in this timezone keep their clocks unchanged regardless of the season.

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.

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

The best time for a call between MSK and IRST is during overlapping business hours (9 AM – 5 PM) in both timezones. To reach someone in IRST during their work day, call between 8:30 AM and 4:30 PM your MSK time. Avoid calling too early or late, as the 0 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.

Do MSK and IRST ever have the same time?

No, MSK and IRST are always 0 hours and 30 minutes apart and never display the same clock time simultaneously. Neither timezone observes DST, so the difference is constant year-round with no seasonal variation. The 0 hours and 30 minutes offset is determined by their fixed positions relative to the Prime Meridian (UTC). You can always rely on this consistent difference when planning across these timezones.

MSK to IRST Converter

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

Timezone Details

Moscow Standard Time

2:36 AM

Friday, April 3, 2026

MSK (UTC+03:00)

Tehran

3:06 AM

Friday, April 3, 2026

Tehran (UTC+03:30)

Difference: +0h 30m

MSK DST: No

24-Hour Overview

MSK — 24-hour overview

12a12a

3a3a

6a6a

9a9a

10a

11a

12p12p

3p3p

6p6p

9p9p

10p

11p

NightMorningBusinessEvening

Tehran — 24-hour overview

12a12a

3a3a

6a6a

9a9a

10a

11a

12p12p

3p3p

6p6p

9p9p

10p

11p

NightMorningBusinessEvening

Frequently Asked Questions

Related Conversions

IRST to MSK

Cities in These Timezones

MSK Cities

Moscow Saint Petersburg

IRST Cities

Tehran

More Tools

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

Learn More

How Time Zones Work Understanding DST Timezone Abbreviations

External Resources

Moscow Standard Time on Wikipedia IANA Time Zone Database