Riyadh to Mountain Brook time converter

Mountain Brook is 8 hours behind Riyadh. When it is 9:00 AM in Riyadh, it is 1:00 AM in Mountain Brook.

Riyadh AST

Sunday, October 18, 2026

Mountain Brook CDT

Sunday, October 18, 2026

Riyadh
Saudi Arabia
Sun, Oct 18
ASTUTC+3
Mountain Brook
Alabama, United States
Sun, Oct 18
CDTUTC-5-8h
Finding your time zone…
Shared working hours (9:00–18:00)

Riyadh to Mountain Brook conversion table

Every hour of today in Riyadh and the matching time in Mountain Brook. Light rows are typical working hours (9:00–18:00).

RiyadhMountain Brook
12:00 AM4:00 PM−1 day
1:00 AM5:00 PM−1 day
2:00 AM6:00 PM−1 day
3:00 AM7:00 PM−1 day
4:00 AM8:00 PM−1 day
5:00 AM9:00 PM−1 day
6:00 AM10:00 PM−1 day
7:00 AM11:00 PM−1 day
8:00 AM12:00 AM
9:00 AM1:00 AM
10:00 AM2:00 AM
11:00 AM3:00 AM
12:00 PM4:00 AM
1:00 PM5:00 AM
2:00 PM6:00 AM
3:00 PM7:00 AM
4:00 PM8:00 AM
5:00 PM9:00 AM
6:00 PM10:00 AM
7:00 PM11:00 AM
8:00 PM12:00 PM
9:00 PM1:00 PM
10:00 PM2:00 PM
11:00 PM3:00 PM

Best time to call or meet

Both sides are at work from 5:00 PM – 6:00 PM in Riyadh (9:00 AM – 10:00 AM in Mountain Brook).

Daylight saving time and the difference

The difference changes during the year because Riyadh and Mountain Brook switch clocks on different dates:

  • Oct 18, 2026 – Nov 1, 2026: -8h
  • Nov 1, 2026 – Mar 14, 2027: -9h
  • Mar 14, 2027 – Oct 18, 2027: -8h

Distance

Riyadh and Mountain Brook are 11,887 km (7,386 miles) apart in a straight line.

More conversions

Mountain Brook to RiyadhRiyadh to New YorkRiyadh to LondonRiyadh to Los AngelesRiyadh to ChicagoRiyadh to TorontoRiyadh to São PauloRiyadh to ParisRiyadh to BerlinRiyadh to MoscowRiyadh to DubaiRiyadh to New DelhiRiyadh to Bangkok
New York to Mountain BrookLondon to Mountain BrookLos Angeles to Mountain BrookChicago to Mountain BrookToronto to Mountain BrookSão Paulo to Mountain BrookParis to Mountain BrookBerlin to Mountain BrookMoscow to Mountain BrookDubai to Mountain BrookNew Delhi to Mountain BrookBangkok to Mountain Brook

Questions and answers

What is the time difference between Riyadh and Mountain Brook?

Mountain Brook is 8 hours behind Riyadh.

What time is it in Mountain Brook when it is 9 AM in Riyadh?

When it is 9:00 AM in Riyadh, it is 1:00 AM in Mountain Brook.

When is the best time to call Mountain Brook from Riyadh?

Both sides are at work from 5:00 PM – 6:00 PM in Riyadh (9:00 AM – 10:00 AM in Mountain Brook).

Does the time difference between Riyadh and Mountain Brook change?

Yes, for part of the year, because daylight saving time starts and ends on different dates or applies on one side only.