Santo Antonio to Riyadh time converter

Riyadh is 5 hours behind Santo Antonio. When it is 9:00 AM in Santo Antonio, it is 4:00 AM in Riyadh.

Santo Antonio CST

Monday, October 19, 2026

Riyadh AST

Monday, October 19, 2026

Santo Antonio
China
Mon, Oct 19
CSTUTC+8
Riyadh
Saudi Arabia
Mon, Oct 19
ASTUTC+3-5h
Finding your time zone…
Shared working hours (9:00–18:00)

Santo Antonio to Riyadh conversion table

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

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

Best time to call or meet

Both sides are at work from 2:00 PM – 6:00 PM in Santo Antonio (9:00 AM – 1:00 PM in Riyadh).

Daylight saving time and the difference

The difference stays 5 hours all year.

Distance

Santo Antonio and Riyadh are 6,753 km (4,196 miles) apart in a straight line.

More conversions

Riyadh to Santo AntonioSanto Antonio to New YorkSanto Antonio to LondonSanto Antonio to Los AngelesSanto Antonio to ChicagoSanto Antonio to TorontoSanto Antonio to São PauloSanto Antonio to ParisSanto Antonio to BerlinSanto Antonio to MoscowSanto Antonio to DubaiSanto Antonio to New DelhiSanto Antonio 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 Santo Antonio and Riyadh?

Riyadh is 5 hours behind Santo Antonio.

What time is it in Riyadh when it is 9 AM in Santo Antonio?

When it is 9:00 AM in Santo Antonio, it is 4:00 AM in Riyadh.

When is the best time to call Riyadh from Santo Antonio?

Both sides are at work from 2:00 PM – 6:00 PM in Santo Antonio (9:00 AM – 1:00 PM in Riyadh).

Does the time difference between Santo Antonio and Riyadh change?

No. The difference stays 5 hours all year.