Riyadh to Casper time converter

Casper is 9 hours behind Riyadh. When it is 9:00 AM in Riyadh, it is 12:00 AM in Casper.

Riyadh AST

Saturday, October 17, 2026

Casper MDT

Saturday, October 17, 2026

Riyadh
Saudi Arabia
Sat, Oct 17
ASTUTC+3
Casper
Wyoming, United States
Sat, Oct 17
MDTUTC-6-9h
Finding your time zone…
Shared working hours (9:00–18:00)

Riyadh to Casper conversion table

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

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

Best time to call or meet

Working hours don't overlap fully. The closest fit is 4:00 PM – 6:00 PM in Riyadh (7:00 AM – 9:00 AM in Casper): 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 Casper switch clocks on different dates:

  • Oct 17, 2026 – Nov 1, 2026: -9h
  • Nov 1, 2026 – Mar 14, 2027: -10h
  • Mar 14, 2027 – Oct 17, 2027: -9h

Distance

Riyadh and Casper are 12,012 km (7,464 miles) apart in a straight line.

More conversions

Casper 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 CasperLondon to CasperLos Angeles to CasperChicago to CasperToronto to CasperSão Paulo to CasperParis to CasperBerlin to CasperMoscow to CasperDubai to CasperNew Delhi to CasperBangkok to Casper

Questions and answers

What is the time difference between Riyadh and Casper?

Casper is 9 hours behind Riyadh.

What time is it in Casper when it is 9 AM in Riyadh?

When it is 9:00 AM in Riyadh, it is 12:00 AM in Casper.

When is the best time to call Casper from Riyadh?

Working hours don't overlap fully. The closest fit is 4:00 PM – 6:00 PM in Riyadh (7:00 AM – 9:00 AM in Casper): working hours on one side, early or late on the other.

Does the time difference between Riyadh and Casper change?

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