Moscow to IRST
+0h 30mMoscow
MSKSOURCEIRST
IRSTGreen rows indicate typical business hours (9 AM - 5 PM)
MSK and IRST on the World Map
The map below highlights the MSK (Moscow Standard Time) and IRST (Iran Standard Time) timezone regions across the globe.
MSK – Moscow Standard Time
UTC+03:00Moscow Standard Time (MSK) is the time zone for Moscow and western Russia, 3 hours ahead of UTC.
- •All Russian train timetables use Moscow Time, regardless of location.
- •Russia abolished daylight saving time in 2011.
- •Moscow is the most populous city in Europe with over 12 million residents.
- •MSK shares the offset with Saudi Arabia (AST) and East Africa (EAT).
IRST – Iran Standard Time
UTC+03:30Iran Standard Time (IRST) is the time zone for Iran, 3 hours and 30 minutes ahead of UTC.
- •IRST is one of only a few time zones with a 30-minute offset.
- •Iran observes daylight saving time, switching to IRDT (UTC+04:30).
- •Tehran has a metropolitan population of over 16 million.
About Moscow
WikipediaMoscow operates on Moscow Standard Time (MSK), UTC+3. As Russia's capital and financial center, MSK is the reference timezone across Russia's 11 time zones.
Russia spans 11 time zones but Moscow Time (MSK) is the reference for all schedules.
Understanding the +0h 30m Gap: Moscow vs IRST
Moscow runs on Moscow Standard Time (MSK) at UTC+03:00. IRST runs on Iran Standard Time (IRST) at UTC+03:30. That puts Moscow 30 minutes ahead of IRST — a difference of +0h 30m at the current offsets.
In practice, when it is 9:00 AM in Moscow it is 9:30 AM in IRST. Midnight in Moscow is 12:30 AM in IRST. Neither zone observes daylight saving time, so the offset between them stays constant all year.
Moscow to IRST time conversion table
| Moscow (MSK) | IRST (IRST) | Day |
|---|---|---|
| 12:00 AM | 12:30 AM | same day |
| 6:00 AM | 6:30 AM | same day |
| 7:00 AM | 7:30 AM | same day |
| 8:00 AM | 8:30 AM | same day |
| 9:00 AM | 9:30 AM | same day |
| 12:00 PM | 12:30 PM | same day |
| 3:00 PM | 3:30 PM | same day |
| 5:00 PM | 5:30 PM | same day |
| 6:00 PM | 6:30 PM | same day |
| 9:00 PM | 9:30 PM | same day |
Why people convert Moscow to IRST time
- Scheduling a call from Moscow to IRST: a 10:00 AM start in Moscow lands at 10:30 AM in IRST, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both Moscow and IRST are inside the 9-to-5 working day between 9:00 AM and 4:30 PM MSK time (9:30 AM–5:00 PM IRST). That is roughly 7 hours 30 minutes of usable overlap.
- Watching a live event or market open: Moscow viewers need 9:30 AM in IRST to catch a 9:00 AM start there, and 11:30 PM if the event is anchored to Moscow.
- Always state the zone abbreviation, not just the hour. "3:00 PM MSK" is unambiguous; "3 PM" across a +0h 30m gap is not.
- Block 9:00 AM–4:30 PM MSK as the recurring meeting window if you work primarily from Moscow and need IRST colleagues present.
About MSK (Moscow Standard Time)
Moscow Standard Time (MSK) is the time zone used in Moscow, St. Petersburg, and much of western Russia. Russia abolished DST in 2011, so MSK is observed year-round. MSK is also the reference time for Russian railways – all train schedules in Russia are given in Moscow Time regardless of the actual local time zone.
About IRST (Iran Standard Time)
Iran Standard Time (IRST) is one of the few time zones with a 30-minute offset. Iran observes daylight saving time (IRDT, UTC+04:30) from late March to late September. Tehran, the capital, is one of the largest cities in the Middle East.
Best time to call between Moscow and IRST
Both Moscow and IRST sit inside the 9 AM – 5 PM working day between 9:00 AM–4:30 PM MSK, which is 9:30 AM–5:00 PM IRST. That gives roughly 7 hours and 30 minutes of shared time — the safest window for a live call or meeting.
Business hours overlap
Moscow and IRST share 7 hours of working-hours overlap (9:00 AM–4:30 PM MSK), so scheduling a live meeting is straightforward.
Moscow is 30 minutes ahead of IRST (MSK UTC+03:00 → IRST UTC+03:30). The shared working window is 9:00 AM–4:30 PM MSK. Remember to re-check around daylight-saving transitions.
Learn More About Time
Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:
Frequently Asked Questions
What is the time difference between Moscow and IRST?
Moscow (MSK, UTC+03:00) is 30 minutes ahead of IRST (IRST, UTC+03:30). The gap is currently +0h 30m.
How do I convert Moscow time to IRST time?
Add +0h 30m to Moscow local time. For example, 9:00 AM in Moscow is 9:30 AM in IRST.
What time is it in IRST right now?
IRST uses IRST at UTC+03:30. Use the live converter at the top of this page — it updates in real time and already accounts for the +0h 30m offset from Moscow.
What is the best time to call IRST from Moscow?
Call between 9:00 AM and 4:30 PM MSK — that maps to 9:30 AM–5:00 PM IRST and keeps both parties inside the working day.
Which is ahead, Moscow or IRST?
Moscow is 30 minutes ahead of IRST. When it is 12:00 PM in Moscow it is 12:30 PM in IRST.
Do Moscow and IRST use different time zones?
Moscow (Russia) uses MSK at UTC+03:00, while IRST uses IRST at UTC+03:30. The IANA identifiers are Europe/Moscow and Asia/Tehran.
Does daylight saving time affect the Moscow–IRST difference?
Neither zone observes daylight saving time, so the +0h 30m offset between Moscow and IRST is fixed all year.
Which other cities share Moscow's time zone?
MSK also covers Moscow, St. Petersburg, Volgograd, Nizhny Novgorod, Kazan, Samara, Rostov-on-Don.
Which countries use MSK, Moscow's zone?
MSK is used in Russia (Moscow, St. Petersburg, western regions).
Is there a day difference between Moscow and IRST?
Not normally. The +0h 30m gap only pushes the date over for late-evening times.
What is the time difference between Moscow and IRST?
IRST is +0h 30m from Moscow.
What timezone is Moscow in?
Moscow operates on Moscow Standard Time (MSK), UTC+3. As Russia's capital and financial center, MSK is the reference timezone across Russia's 11 time zones.
What timezone is IRST in?
IRST operates on its local timezone.
What are the business hours in Moscow?
Standard business hours in Moscow are 9:00 AM - 6:00 PM MSK.
Which countries use MSK (Moscow Standard Time)?
MSK is used in Russia (Moscow, St. Petersburg, western regions).
Does MSK observe daylight saving time?
No, MSK does not observe daylight saving time and remains at UTC+03:00 year-round.
What are some interesting facts about MSK?
All Russian train timetables use Moscow Time, regardless of location. Russia abolished daylight saving time in 2011.
Which cities are in the IRST timezone?
Major cities in the IRST timezone include Tehran, Isfahan, Mashhad, Tabriz, Shiraz, Karaj.
What is the UTC offset for IRST?
Iran Standard Time (IRST) is at UTC+03:30. During daylight saving time, it shifts to IRDT.
What should I know about the IRST timezone?
IRST is one of only a few time zones with a 30-minute offset. Iran observes daylight saving time, switching to IRDT (UTC+04:30).
When is it midnight in Moscow, what time is it in IRST?
When it is 12:00 AM (midnight) in Moscow (MSK), it is +0h 30m later in IRST (IRST).
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