Moscow to AST
-7hMoscow
MSKSOURCEAST
ASTGreen rows indicate typical business hours (9 AM - 5 PM)
MSK and AST on the World Map
The map below highlights the MSK (Moscow Standard Time) and AST (Atlantic 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).
AST – Atlantic Standard Time
UTC-04:00Atlantic Standard Time (AST) is the time zone for the Canadian Atlantic provinces and the Caribbean, 4 hours behind UTC.
- •Puerto Rico uses AST year-round and does not observe DST.
- •AST is 1 hour ahead of EST.
- •Halifax, the capital of Nova Scotia, is the largest city in AST Canada.
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.
Time Conversion Guide: Moscow to AST
Moscow runs on Moscow Standard Time (MSK) at UTC+03:00. AST runs on Atlantic Standard Time (AST) at UTC-04:00. That puts Moscow 7 hours behind AST — a difference of -7h at the current offsets.
In practice, when it is 9:00 AM in Moscow it is 2:00 AM in AST. Midnight in Moscow is 5:00 PM in AST. Neither zone observes daylight saving time, so the offset between them stays constant all year.
Moscow to AST time conversion table
| Moscow (MSK) | AST (AST) | Day |
|---|---|---|
| 12:00 AM | 5:00 PM | previous day |
| 6:00 AM | 11:00 PM | previous day |
| 7:00 AM | 12:00 AM | same day |
| 8:00 AM | 1:00 AM | same day |
| 9:00 AM | 2:00 AM | same day |
| 12:00 PM | 5:00 AM | same day |
| 3:00 PM | 8:00 AM | same day |
| 5:00 PM | 10:00 AM | same day |
| 6:00 PM | 11:00 AM | same day |
| 9:00 PM | 2:00 PM | same day |
Why people convert Moscow to AST time
- Scheduling a call from Moscow to AST: a 10:00 AM start in Moscow lands at 3:00 AM in AST, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both Moscow and AST are inside the 9-to-5 working day between 4:00 PM and 5:00 PM MSK time (9:00 AM–10:00 AM AST). That is roughly 1 hours of usable overlap.
- Coordinating a Moscow-based team with AST contacts: quoting times in the other side's local clock — not your own — removes the single biggest source of missed meetings.
- Always state the zone abbreviation, not just the hour. "3:00 PM MSK" is unambiguous; "3 PM" across a -7h gap is not.
- Block 4:00 PM–5:00 PM MSK as the recurring meeting window if you work primarily from Moscow and need AST 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 AST (Atlantic Standard Time)
Atlantic Standard Time (AST) covers Canada's Atlantic provinces (Nova Scotia, New Brunswick, Prince Edward Island, and most of Labrador), as well as several Caribbean nations. Puerto Rico and the US Virgin Islands use AST year-round without daylight saving time. The Canadian provinces switch to Atlantic Daylight Time (ADT) in summer.
Best time to call between Moscow and AST
Both Moscow and AST sit inside the 9 AM – 5 PM working day between 4:00 PM–5:00 PM MSK, which is 9:00 AM–10:00 AM AST. That gives roughly 1 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
Moscow and AST overlap for only 60 minutes (4:00 PM–5:00 PM MSK), so meetings have to be booked precisely.
Moscow is 7 hours behind AST (MSK UTC+03:00 → AST UTC-04:00). The shared working window is 4:00 PM–5:00 PM MSK. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
Moscow
Does not observe DST
AST
☀ Currently in DST
Standard: UTC-04:00 · DST: UTC-03:00
Clocks fall back on Sun, Nov 1, 2026
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 AST?
Moscow (MSK, UTC+03:00) is 7 hours behind AST (AST, UTC-04:00). The gap is currently -7h.
How do I convert Moscow time to AST time?
Add -7h to Moscow local time. For example, 9:00 AM in Moscow is 2:00 AM in AST.
What time is it in AST right now?
AST uses AST at UTC-04:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -7h offset from Moscow.
What is the best time to call AST from Moscow?
Call between 4:00 PM and 5:00 PM MSK — that maps to 9:00 AM–10:00 AM AST and keeps both parties inside the working day.
Which is behind, Moscow or AST?
Moscow is 7 hours behind AST. When it is 12:00 PM in Moscow it is 5:00 AM in AST.
Do Moscow and AST use different time zones?
Moscow (Russia) uses MSK at UTC+03:00, while AST uses AST at UTC-04:00. The IANA identifiers are Europe/Moscow and America/Halifax.
Does daylight saving time affect the Moscow–AST difference?
Neither zone observes daylight saving time, so the -7h offset between Moscow and AST 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 AST?
Not normally. The -7h gap only pushes the date over the previous day.
What is the time difference between Moscow and AST?
AST is -7h 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 AST in?
AST 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 AST timezone?
Major cities in the AST timezone include Halifax, San Juan, Santo Domingo, Caracas, La Paz, Fredericton, Charlottetown.
What is the UTC offset for AST?
Atlantic Standard Time (AST) is at UTC-04:00. During daylight saving time, it shifts to ADT.
What should I know about the AST timezone?
Puerto Rico uses AST year-round and does not observe DST. AST is 1 hour ahead of EST.
When is it midnight in Moscow, what time is it in AST?
When it is 12:00 AM (midnight) in Moscow (MSK), it is -7h later in AST (AST).
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