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—
San Juan · Barbados · Halifax (winter)
For international scheduling, try the global meeting time planner.
Difference
MSK vs AST
UTC → UTC
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—
Moscow · St. Petersburg
AST to MSK converter
AST to MSK Converter
Convert AST (San Juan) to MSK (Moscow) now. Live clocks, the current time difference, and a simple meeting window — free.
America/Puerto_Rico
—
AST → MSK
To · Moscow Standard Time
—
Europe/Moscow
Interactive diagram
Watch AST convert into MSK
Drag the Atlantic hour. Watch the Moscow clock change.
Atlantic
9:00 AM AST
—
MSK ← AST
Moscow
—
Full-day chart
AST to MSK hourly conversion chart
Full-day table. Tap a row to copy. Labels follow daylight saving.
| Atlantic | Moscow | UTC offsets |
|---|
Meeting times
Best AST to MSK meeting window
Find hours that work on both sides. Then save the slot to your calendar.
Follow along
Step-by-step AST to MSK conversion
Four short steps to convert any AST time to MSK.
Choose AST time
Select any hour in Atlantic Standard Time. Smart mode uses America/Puerto_Rico.
AST to MSK conversion guide
AST to MSK conversion guide
This AST to MSK converter shows Moscow Standard Time (UTC+3) for any Atlantic Standard Time (UTC−4) time. Use it to schedule between San Juan and Moscow. Choose Smart DST for live city clocks. Choose Fixed mode when you only want the AST and MSK labels.
Atlantic
AST
UTC−4
San Juan · Barbados · Halifax (winter)
AST vs MSK—
Moscow
MSK
UTC+3
Moscow · St. Petersburg
What is AST to MSK conversion?
AST to MSK conversion turns a AST clock into the matching MSK time. Use it for calls, travel, and teams in San Juan and Moscow.
AST to MSK time difference
MSK is 7 hours ahead of AST. Add 7 hours to the AST time to get MSK. The live clocks at the top show the current AST to MSK gap.
AST vs MSK
AST is UTC−4. MSK is UTC+3. They are different names. If a region uses daylight saving, check the live labels.
AST to MSK now / current time
Need ast to msk right now? Read the live clocks, or tap Use current time for an instant AST → MSK result.
AST to MSK time difference
Season / context — tap to explore
See how daylight saving can change this pair.
Atlantic—
—AST → MSK
Moscow—
Quick answers
Atlantic
Atlantic Standard Time (AST)
UTC−4
Atlantic Standard Time (AST) is UTC−4. Smart DST uses the city clock America/Puerto_Rico so daylight saving stays correct for San Juan · Barbados · Halifax (winter).
- Cities: San Juan · Barbados · Halifax (winter)
- City clock: America/Puerto_Rico
- Fixed AST: UTC−4
- On this page it pairs with MSK (UTC+3)
Moscow
Moscow Standard Time (MSK)
UTC+3
Moscow Standard Time (MSK) is UTC+3. Smart DST uses Europe/Moscow for cities such as Moscow · St. Petersburg.
- Cities: Moscow · St. Petersburg
- City clock: Europe/Moscow
- Fixed MSK: UTC+3
- From AST: MSK is 7 hours ahead of AST
AST to MSK FAQ
Common AST to MSK questions
What is the AST to MSK time difference?
MSK is 7 hours ahead of AST. Fixed labels: AST = UTC−4, MSK = UTC+3. Add 7 hours to the AST time to get MSK.
How do I convert AST to MSK quickly?
Add 7 hours to the AST time to get MSK. Example: 3:00 AM AST → 10:00 AM MSK. Or use the live AST to MSK converter above.
Is MSK the same as AST?
No. AST is UTC−4 (San Juan · Barbados · Halifax (winter)). MSK is UTC+3 (Moscow · St. Petersburg).
What is a good AST to MSK meeting time?
MSK is ahead. Try 7:00–11:00 AM AST. That is about 2:00 PM–6:00 PM MSK. Use the meeting planner on this page to export an ICS or Google Calendar invite.
What cities use AST and MSK?
AST is common in San Juan · Barbados · Halifax (winter). MSK is common in Moscow · St. Petersburg. Smart DST uses America/Puerto_Rico and Europe/Moscow.