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—
Moscow · St. Petersburg
Plan global invites faster using the cross time zone meeting planner.
Difference
AST vs MSK
UTC → UTC
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San Juan · Barbados · Halifax (winter)
MSK to AST converter
MSK to AST Converter
Convert MSK (Moscow) to AST (San Juan) now. Live clocks, the current time difference, and a simple meeting window — free.
Europe/Moscow
—
MSK → AST
To · Atlantic Standard Time
—
America/Puerto_Rico
Interactive diagram
Watch MSK convert into AST
Drag the Moscow hour. Watch the Atlantic clock change.
Moscow
9:00 AM MSK
—
AST ← MSK
Atlantic
—
Full-day chart
MSK to AST hourly conversion chart
Full-day table. Tap a row to copy. Labels follow daylight saving.
| Moscow | Atlantic | UTC offsets |
|---|
Meeting times
Best MSK to AST meeting window
Find hours that work on both sides. Then save the slot to your calendar.
Follow along
Step-by-step MSK to AST conversion
Four short steps to convert any MSK time to AST.
Choose MSK time
Select any hour in Moscow Standard Time. Smart mode uses Europe/Moscow.
MSK to AST conversion guide
MSK to AST conversion guide
This MSK to AST converter shows Atlantic Standard Time (UTC−4) for any Moscow Standard Time (UTC+3) time. Use it to schedule between Moscow and San Juan. Choose Smart DST for live city clocks. Choose Fixed mode when you only want the MSK and AST labels.
Moscow
MSK
UTC+3
Moscow · St. Petersburg
MSK vs AST—
Atlantic
AST
UTC−4
San Juan · Barbados · Halifax (winter)
What is MSK to AST conversion?
MSK to AST conversion turns a MSK clock into the matching AST time. Use it for calls, travel, and teams in Moscow and San Juan.
MSK to AST time difference
AST is 7 hours behind MSK. Subtract 7 hours from the MSK time to get AST. The live clocks at the top show the current MSK to AST gap.
MSK vs AST
MSK is UTC+3. AST is UTC−4. They are different names. If a region uses daylight saving, check the live labels.
MSK to AST now / current time
Need msk to ast right now? Read the live clocks, or tap Use current time for an instant MSK → AST result.
MSK to AST time difference
Season / context — tap to explore
See how daylight saving can change this pair.
Moscow—
—MSK → AST
Atlantic—
Quick answers
Moscow
Moscow Standard Time (MSK)
UTC+3
Moscow Standard Time (MSK) is UTC+3. Smart DST uses the city clock Europe/Moscow so daylight saving stays correct for Moscow · St. Petersburg.
- Cities: Moscow · St. Petersburg
- City clock: Europe/Moscow
- Fixed MSK: UTC+3
- On this page it pairs with AST (UTC−4)
Atlantic
Atlantic Standard Time (AST)
UTC−4
Atlantic Standard Time (AST) is UTC−4. Smart DST uses America/Puerto_Rico for cities such as San Juan · Barbados · Halifax (winter).
- Cities: San Juan · Barbados · Halifax (winter)
- City clock: America/Puerto_Rico
- Fixed AST: UTC−4
- From MSK: AST is 7 hours behind MSK
MSK to AST FAQ
Common MSK to AST questions
What is the MSK to AST time difference?
AST is 7 hours behind MSK. Fixed labels: MSK = UTC+3, AST = UTC−4. Subtract 7 hours from the MSK time to get AST.
How do I convert MSK to AST quickly?
Subtract 7 hours from the MSK time to get AST. Example: 3:00 AM MSK → 8:00 PM AST. Or use the live MSK to AST converter above.
Is AST the same as MSK?
No. MSK is UTC+3 (Moscow · St. Petersburg). AST is UTC−4 (San Juan · Barbados · Halifax (winter)).
What is a good MSK to AST meeting time?
AST is behind. Try 10:00 AM–3:00 PM MSK. That is about 3:00 AM–8:00 AM AST. Use the meeting planner on this page to export an ICS or Google Calendar invite.
What cities use MSK and AST?
MSK is common in Moscow · St. Petersburg. AST is common in San Juan · Barbados · Halifax (winter). Smart DST uses Europe/Moscow and America/Puerto_Rico.