Moscow Standard Time (msk) is used in Russia. The IANA timezone identifier is Europe/Moscow.

Arabia Standard Time (ast) is used in Saudi Arabia. The IANA timezone identifier is Asia/Riyadh.

MSK to AST Time Converter

Moscow Standard Time → Arabia Standard Time

MSK = UTC+3AST = UTC+3

⚠️ AST is ambiguous — on this page it means Arabia Standard Time. It also refers to:

MSK → Atlantic Standard Time (Halifax) ↗

ClockinSync

BASE

09:00

Work Clients Team +

00:0006:0012:0018:0024:00

AST (Riyadh)

Saudi Arabia · UTC±0

09:00

London

United Kingdom · -2h

07:00

New York

USA · -7h

02:00

Tokyo

Japan · +6h

15:00

Dubai

United Arab Emirates · +1h

10:00

MSK (Moscow) vs AST (Riyadh) — time difference

MSK (Moscow) and AST (Riyadh) are in the same timezone. When it's noon in MSK (Moscow), it's 12:00 in AST (Riyadh).

MSK (Moscow) runs on Europe/Moscow; AST (Riyadh) runs on Asia/Riyadh. Together they are 0 hours apart.

Shared working hours

Both MSK (Moscow) and AST (Riyadh) are simultaneously in business hours for 8 hours per day (assuming standard 9:00–17:00 working hours).

00:0006:0012:0018:0024:00

MSK (Moscow)

AST (Riyadh)

Overlap (8h)

Best call times between these locations

There is a 8-hour daily window where both locations are in business hours. The 3 best slots are listed below.

09:00 Moscow / 09:00 Riyadh✓ Both working

10:00 Moscow / 10:00 Riyadh✓ Both working

11:00 Moscow / 11:00 Riyadh✓ Both working

Working hours defined as 09:00–17:00 local time for each location.

Public holidays this year

MSK (Moscow)2 holidays

Jun 12Russia DayTODAY

Nov 4Unity Day

AST (Riyadh)

No upcoming public holidays this year.

MSK (Moscow) and AST (Riyadh) — practical scheduling

MSK (Moscow) (Russia) and AST (Riyadh) (Saudi Arabia) are 0 hours apart. With a 8-hour daily overlap in standard business hours, both teams can connect in real time without either side stretching beyond their normal workday.

💡 Practical scheduling guidelines

✅

If you are in MSK (Moscow), aim for 09:00–10:00, which corresponds to 09:00–10:00 in AST (Riyadh) — both teams are within working hours.

✅

If you are in MSK (Moscow), aim for 10:00–11:00, which corresponds to 10:00–11:00 in AST (Riyadh) — both teams are within working hours.

✅

If you are in MSK (Moscow), aim for 11:00–12:00, which corresponds to 11:00–12:00 in AST (Riyadh) — both teams are within working hours.

Avoid scheduling mistakes — especially around daylight saving changes. Use the ClockinSync Chrome Extension to instantly verify and compare both time zones directly in your browser, without manual calculations.

Add to your browser — Free →

Need a specific time? Use the slider or type directly into the input bar — it understands "3pm", "15:30", and location-specific formats like "9am MSK (Moscow)".

MSK (Moscow) ↔ AST (Riyadh)

8h of business hours overlap daily (09:00–17:00)

MSK (Moscow)

AST (Riyadh)

00:00

01:00

02:00

03:00

04:00

05:00

06:00

07:00

08:00

09:00Working

10:00Working

11:00Working

12:00Working

13:00Working

14:00Working

15:00Working

16:00Working

17:00

18:00

19:00

20:00

21:00

22:00

23:00

Working hours: 09:00–17:00 local. Green = both working. Purple = one side only.

Frequently Asked Questions

What is the difference between msk and ast?

Moscow Standard Time (msk) is UTC+3 and Arabia Standard Time (ast) is UTC+3. The difference between them is 0 hours.

Where is msk used?

Moscow Standard Time (msk) is used in Russia and surrounding regions. The IANA timezone identifier is Europe/Moscow.

Where is ast used?

Arabia Standard Time (ast) is used in Saudi Arabia and surrounding regions. The IANA timezone identifier is Asia/Riyadh. Note: ast is ambiguous and may refer to other timezones.

How do I convert msk to ast?

Use the interactive converter above. Drag the time slider to any msk time and the ast equivalent updates instantly. You can also type a time like "3pm" or "15:00" in the input bar.

Popular MSK conversions

MSK → London MSK → New York MSK → Tokyo MSK → Dubai MSK → Sydney MSK → Paris MSK → Berlin MSK → Singapore MSK → Los Angeles MSK → Toronto

Popular AST conversions

London → AST New York → AST Tokyo → AST Dubai → AST Sydney → AST Paris → AST Berlin → AST Singapore → AST Los Angeles → AST Toronto → AST