SGT to Riyadh
-5hSGT
SGTSOURCERiyadh
ASTGreen rows indicate typical business hours (9 AM - 5 PM)
SGT and AST on the World Map
The map below highlights the SGT (Singapore Standard Time) and AST (Arabia Standard Time) timezone regions across the globe.
SGT – Singapore Standard Time
UTC+08:00Singapore Standard Time (SGT) is the time zone for Singapore, 8 hours ahead of UTC.
- •Singapore uses UTC+08:00 despite being at about 104°E longitude (closer to UTC+07:00).
- •Singapore does not observe daylight saving time.
- •The Singapore Exchange (SGX) operates on SGT.
AST – Arabia Standard Time
UTC+03:00Arabia Standard Time (AST, UTC+03:00) is the time zone for Saudi Arabia and the other Gulf states of the Arabian peninsula.
- •None of the Gulf states on Arabia Standard Time observe daylight saving.
- •AST is the same offset as Moscow Standard Time and East Africa Time.
- •Riyadh is one hour ahead of Central European Time in winter.
- •The AST abbreviation is shared with Atlantic Standard Time (UTC-04:00).
About Riyadh
WikipediaRiyadh operates on Arabia Standard Time (AST), UTC+3. As OPEC's de facto capital and home to Tadawul, Riyadh time impacts global energy markets.
Riyadh is growing rapidly as part of Saudi Vision 2030 modernization.
Comparing Time Zones: SGT and Riyadh
SGT runs on Singapore Standard Time (SGT) at UTC+08:00. Riyadh runs on Arabian Standard Time (AST) at UTC+03:00. That puts SGT 5 hours behind Riyadh — a difference of -5h at the current offsets.
In practice, when it is 9:00 AM in SGT it is 4:00 AM in Riyadh. Midnight in SGT is 7:00 PM in Riyadh. Neither zone observes daylight saving time, so the offset between them stays constant all year.
SGT to Riyadh time conversion table
| SGT (SGT) | Riyadh (AST) | Day |
|---|---|---|
| 12:00 AM | 7:00 PM | previous day |
| 6:00 AM | 1:00 AM | same day |
| 7:00 AM | 2:00 AM | same day |
| 8:00 AM | 3:00 AM | same day |
| 9:00 AM | 4:00 AM | same day |
| 12:00 PM | 7:00 AM | same day |
| 3:00 PM | 10:00 AM | same day |
| 5:00 PM | 12:00 PM | same day |
| 6:00 PM | 1:00 PM | same day |
| 9:00 PM | 4:00 PM | same day |
Why people convert SGT to Riyadh time
- Scheduling a call from SGT to Riyadh: a 10:00 AM start in SGT lands at 5:00 AM in Riyadh, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both SGT and Riyadh are inside the 9-to-5 working day between 2:00 PM and 5:00 PM SGT time (9:00 AM–12:00 PM AST). That is roughly 3 hours of usable overlap.
- Watching a live event or market open: SGT viewers need 4:00 AM in Riyadh to catch a 9:00 AM start there, and 5:00 AM if the event is anchored to SGT.
- Always state the zone abbreviation, not just the hour. "3:00 PM SGT" is unambiguous; "3 PM" across a -5h gap is not.
- Block 2:00 PM–5:00 PM SGT as the recurring meeting window if you work primarily from SGT and need Riyadh colleagues present.
About SGT (Singapore Standard Time)
Singapore Standard Time (SGT) is used in Singapore year-round. Singapore does not observe daylight saving time. Despite being geographically close to the UTC+07:00 zone, Singapore uses UTC+08:00 to align with major trading partners like China, Hong Kong, and Malaysia. Singapore is a major global financial hub.
About AST (Arabia Standard Time)
Arabia Standard Time (AST) is fixed at UTC+03:00 all year across Saudi Arabia, Qatar, Kuwait, Bahrain, Iraq and Yemen. None of these countries observes daylight saving time, so the offset never changes. The abbreviation collides with Atlantic Standard Time (UTC-04:00) used in eastern Canada and the Caribbean; this page covers the Arabian peninsula meaning. Arabia Standard Time is the same offset as Moscow Standard Time and East Africa Time, which makes scheduling with Europe straightforward — Riyadh is one hour ahead of Central European Time in winter and level with it during European summer time.
Best time to call between SGT and Riyadh
Both SGT and Riyadh sit inside the 9 AM – 5 PM working day between 2:00 PM–5:00 PM SGT, which is 9:00 AM–12:00 PM AST. That gives roughly 3 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
SGT and Riyadh overlap for about 3 hours during the working day — enough for meetings if you avoid the edges of the window.
SGT is 5 hours behind Riyadh (SGT UTC+08:00 → AST UTC+03:00). The shared working window is 2:00 PM–5:00 PM SGT. Remember to re-check around daylight-saving transitions.
Learn More About Time
Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:
Frequently Asked Questions
What is the time difference between SGT and Riyadh?
SGT (SGT, UTC+08:00) is 5 hours behind Riyadh (AST, UTC+03:00). The gap is currently -5h.
How do I convert SGT time to Riyadh time?
Add -5h to SGT local time. For example, 9:00 AM in SGT is 4:00 AM in Riyadh.
What time is it in Riyadh right now?
Riyadh uses AST at UTC+03:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -5h offset from SGT.
What is the best time to call Riyadh from SGT?
Call between 2:00 PM and 5:00 PM SGT — that maps to 9:00 AM–12:00 PM AST and keeps both parties inside the working day.
Which is behind, SGT or Riyadh?
SGT is 5 hours behind Riyadh. When it is 12:00 PM in SGT it is 7:00 AM in Riyadh.
Do SGT and Riyadh use different time zones?
SGT uses SGT at UTC+08:00, while Riyadh (Saudi Arabia) uses AST at UTC+03:00. The IANA identifiers are Asia/Singapore and Asia/Riyadh.
Does daylight saving time affect the SGT–Riyadh difference?
Neither zone observes daylight saving time, so the -5h offset between SGT and Riyadh is fixed all year.
Which other cities share SGT's time zone?
SGT also covers Singapore.
Which countries use SGT, SGT's zone?
SGT is used in Singapore.
Is there a day difference between SGT and Riyadh?
Not normally. The -5h gap only pushes the date over the previous day.
What is the time difference between SGT and Riyadh?
Riyadh is -5h from SGT.
What timezone is SGT in?
SGT operates on its local timezone.
What timezone is Riyadh in?
Riyadh operates on Arabia Standard Time (AST), UTC+3. As OPEC's de facto capital and home to Tadawul, Riyadh time impacts global energy markets.
What are the business hours in Riyadh?
Standard business hours in Riyadh are 8:00 AM - 4:00 PM AST (Sunday-Thursday).
Which countries use SGT (Singapore Standard Time)?
SGT is used in Singapore.
Does SGT observe daylight saving time?
No, SGT does not observe daylight saving time and remains at UTC+08:00 year-round.
What are some interesting facts about SGT?
Singapore uses UTC+08:00 despite being at about 104°E longitude (closer to UTC+07:00). Singapore does not observe daylight saving time.
Which cities are in the AST timezone?
Major cities in the AST timezone include Riyadh, Jeddah, Doha, Kuwait City, Baghdad.
What is the UTC offset for AST?
Arabia Standard Time (AST) is at UTC+03:00.
What should I know about the AST timezone?
None of the Gulf states on Arabia Standard Time observe daylight saving. AST is the same offset as Moscow Standard Time and East Africa Time.
When is it midnight in SGT, what time is it in Riyadh?
When it is 12:00 AM (midnight) in SGT (SGT), it is -5h later in Riyadh (AST).
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