Riyadh to Diamond Bar time converter

Diamond Bar is 10 hours behind Riyadh. When it is 9:00 AM in Riyadh, it is 11:00 PM (Sun, Oct 18) in Diamond Bar.

Riyadh AST

Monday, October 19, 2026

Diamond Bar PDT

Sunday, October 18, 2026

Riyadh
Saudi Arabia
Mon, Oct 19
ASTUTC+3
Diamond Bar
California, United States
Sun, Oct 18
PDTUTC-7-10h
Finding your time zone…
Shared working hours (9:00–18:00)

Riyadh to Diamond Bar conversion table

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

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

Best time to call or meet

Working hours don't overlap fully. The closest fit is 5:00 PM – 6:00 PM in Riyadh (7:00 AM – 8:00 AM in Diamond Bar): working hours on one side, early or late on the other.

Daylight saving time and the difference

The difference changes during the year because Riyadh and Diamond Bar switch clocks on different dates:

  • Oct 19, 2026 – Nov 1, 2026: -10h
  • Nov 1, 2026 – Mar 14, 2027: -11h
  • Mar 14, 2027 – Oct 19, 2027: -10h

Distance

Riyadh and Diamond Bar are 13,285 km (8,255 miles) apart in a straight line.

More conversions

Diamond Bar 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 Diamond BarLondon to Diamond BarLos Angeles to Diamond BarChicago to Diamond BarToronto to Diamond BarSão Paulo to Diamond BarParis to Diamond BarBerlin to Diamond BarMoscow to Diamond BarDubai to Diamond BarNew Delhi to Diamond BarBangkok to Diamond Bar

Questions and answers

What is the time difference between Riyadh and Diamond Bar?

Diamond Bar is 10 hours behind Riyadh.

What time is it in Diamond Bar when it is 9 AM in Riyadh?

When it is 9:00 AM in Riyadh, it is 11:00 PM (Sun, Oct 18) in Diamond Bar.

When is the best time to call Diamond Bar from Riyadh?

Working hours don't overlap fully. The closest fit is 5:00 PM – 6:00 PM in Riyadh (7:00 AM – 8:00 AM in Diamond Bar): working hours on one side, early or late on the other.

Does the time difference between Riyadh and Diamond Bar change?

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