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)1 holiday

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