MSK to AST Converter & Meeting Planner
Quick answer: 9:00 AM MSK = 2:00 AM AST (fixed +03:00 standard offset — not DST-adjusted). Use the interactive converter below for DST-aware local-time scheduling.
Planning a call or meeting between Moscow Standard Time (MSK) and Atlantic Standard Time (AST)? You need to account for the standard time difference. Atlantic Standard Time is normally 7 hours behind Moscow Standard Time. Whether you are coordinating between teams in Moscow and Saint Petersburg and Halifax and San Juan, our live tool has you covered. Use our interactive overlap studio below to find the perfect waking hours for both regions, taking into account any seasonal Daylight Saving Time (DST) changes.
24-Hour Conversion Table
Quick reference: 12:00 AM MSK = 5:00 PM AST. The full 24-hour MSK to AST table below uses fixed standard offsets for exact abbreviation searches.
Example: 3:00 PM MSK = 8:00 AM AST.
| MSK Time | AST Time |
|---|---|
| 12:00 AM (00:00) | 5:00 PM (17:00)-1 day |
| 1:00 AM (01:00) | 6:00 PM (18:00)-1 day |
| 2:00 AM (02:00) | 7:00 PM (19:00)-1 day |
| 3:00 AM (03:00) | 8:00 PM (20:00)-1 day |
| 4:00 AM (04:00) | 9:00 PM (21:00)-1 day |
| 5:00 AM (05:00) | 10:00 PM (22:00)-1 day |
| 6:00 AM (06:00) | 11:00 PM (23:00)-1 day |
| 7:00 AM (07:00) | 12:00 AM (00:00) |
| 8:00 AM (08:00) | 1:00 AM (01:00) |
| 9:00 AM (09:00) | 2:00 AM (02:00) |
| 10:00 AM (10:00) | 3:00 AM (03:00) |
| 11:00 AM (11:00) | 4:00 AM (04:00) |
| 12:00 PM (12:00) | 5:00 AM (05:00) |
| 1:00 PM (13:00) | 6:00 AM (06:00) |
| 2:00 PM (14:00) | 7:00 AM (07:00) |
| 3:00 PM (15:00) | 8:00 AM (08:00) |
| 4:00 PM (16:00) | 9:00 AM (09:00) |
| 5:00 PM (17:00) | 10:00 AM (10:00) |
| 6:00 PM (18:00) | 11:00 AM (11:00) |
| 7:00 PM (19:00) | 12:00 PM (12:00) |
| 8:00 PM (20:00) | 1:00 PM (13:00) |
| 9:00 PM (21:00) | 2:00 PM (14:00) |
| 10:00 PM (22:00) | 3:00 PM (15:00) |
| 11:00 PM (23:00) | 4:00 PM (16:00) |
Best time to call Halifax from Moscow
For most work calls, compare the normal business day in Moscow (MSK) with the business day in Halifax (AST). MSK commonly covers Eastern Europe, Eurasia, while AST is mainly associated with North America, Caribbean.
⚠️ Note: 2026-07-05 is not a normal workday in one or both regions based on their configured calendar. The overlap below should be treated as a reference, not a guaranteed office-hours window.
✅ The most practical overlap on 2026-07-05 is usually 3:00 PM - 6:00 PM MSK, which corresponds to 9:00 AM - 12:00 PM AST. This window sits inside the typical MSK workday (9:00 AM - 6:00 PM) and the AST workday (9:00 AM - 5:00 PM).
- DST Safety: MSK or AST may shift during Daylight Saving Time. Always confirm the converted time for your specific date.
- Moscow Exchange (MOEX): 09:50-18:50 local time in Moscow.
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Frequently Asked Questions
What is the time difference between MSK and AST?
During standard time, Atlantic Standard Time is 7 hours behind Moscow Standard Time.
Does Russia observe Daylight Saving Time?
Russia abolished Daylight Saving Time entirely in 2014, settling permanently on standard time after a contentious experiment with year-round summer time that began in 2011. Moscow Standard Time has remained fixed at UTC+03:00 ever since, with no seasonal clock changes of any kind.
Are MSK and Eastern European Summer Time (EEST) the same?
During summer, countries observing Eastern European Time — including Ukraine, Romania, and Greece — shift to EEST at UTC+03:00, which numerically matches MSK exactly. However, MSK holds at UTC+03:00 year-round, while EEST is a temporary designation that reverts to UTC+02:00 when those countries return to standard time each autumn.
Does the Caribbean observe Daylight Saving Time?
The vast majority of Caribbean nations and territories — including Puerto Rico, the Dominican Republic, the US Virgin Islands, Trinidad and Tobago, and Barbados — do not observe Daylight Saving Time and remain on AST (UTC-4) year-round. This means these territories share the same clock as Halifax only during the Atlantic Standard Time window in winter, diverging by one hour once Canada and Bermuda advance to ADT each spring.
What is the difference between AST and ADT?
AST (Atlantic Standard Time) is the standard winter offset at UTC-4:00, observed from the first Sunday in November through the second Sunday in March across all AST regions. ADT (Atlantic Daylight Time) is the summer offset at UTC-3:00, applied by Eastern Canadian provinces and Bermuda when they advance their clocks by one hour during Daylight Saving Time.