O'Fallon to Riyadh time converter

Riyadh is 8 hours ahead of O'Fallon. When it is 9:00 AM in O'Fallon, it is 5:00 PM in Riyadh.

O'Fallon CDT

Monday, October 19, 2026

Riyadh AST

Monday, October 19, 2026

O'Fallon
Illinois, United States
Mon, Oct 19
CDTUTC-5
Riyadh
Saudi Arabia
Mon, Oct 19
ASTUTC+3+8h
Finding your time zone…
Shared working hours (9:00–18:00)

O'Fallon to Riyadh conversion table

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

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

Best time to call or meet

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

Daylight saving time and the difference

The difference changes during the year because O'Fallon and Riyadh switch clocks on different dates:

  • Oct 19, 2026 – Nov 1, 2026: +8h
  • Nov 1, 2026 – Mar 14, 2027: +9h
  • Mar 14, 2027 – Oct 19, 2027: +8h

Distance

O'Fallon and Riyadh are 11,655 km (7,242 miles) apart in a straight line.

More conversions

Riyadh to O'FallonO'Fallon to New YorkO'Fallon to LondonO'Fallon to Los AngelesO'Fallon to ChicagoO'Fallon to TorontoO'Fallon to São PauloO'Fallon to ParisO'Fallon to BerlinO'Fallon to MoscowO'Fallon to DubaiO'Fallon to New DelhiO'Fallon to Bangkok
New York to RiyadhLondon to RiyadhLos Angeles to RiyadhChicago to RiyadhToronto to RiyadhSão Paulo to RiyadhParis to RiyadhBerlin to RiyadhMoscow to RiyadhDubai to RiyadhNew Delhi to RiyadhBangkok to Riyadh

Questions and answers

What is the time difference between O'Fallon and Riyadh?

Riyadh is 8 hours ahead of O'Fallon.

What time is it in Riyadh when it is 9 AM in O'Fallon?

When it is 9:00 AM in O'Fallon, it is 5:00 PM in Riyadh.

When is the best time to call Riyadh from O'Fallon?

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

Does the time difference between O'Fallon and Riyadh change?

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