SGT (Singapore) ↔ AST (Riyadh) — time offset
SGT (Singapore) is 5 hours ahead of AST (Riyadh). When SGT (Singapore) clocks hit noon, AST (Riyadh) reads 07:00.
SGT (Singapore) observes Asia/Singapore and AST (Riyadh) observes Asia/Riyadh — a 5 hours gap between them.
Mutual working hours
Every working day, SGT (Singapore) and AST (Riyadh) are both in business hours for 3 hours simultaneously.
00:0006:0012:0018:0024:00
Optimal meeting slots
SGT (Singapore) and AST (Riyadh) share 3 hours of business hours overlap daily.
14:00 Singapore / 09:00 Riyadh✓ Both working
15:00 Singapore / 10:00 Riyadh✓ Both working
16:00 Singapore / 11:00 Riyadh✓ Both working
Assumes a standard 9 AM–5 PM workday in each location's local timezone.
Holiday calendar for both locations
SGT (Singapore)3 holidays
Aug 10National Day
Nov 9Deepavali
Dec 25Christmas Day
AST (Riyadh)
No upcoming public holidays this year.
Working across SGT (Singapore) and AST (Riyadh)
Coordinating between SGT (Singapore) (Singapore) and AST (Riyadh) (Saudi Arabia) means working around a 5-hour time difference. The 3-hour overlap window gives both teams a natural slot for real-time collaboration without anyone working outside normal hours.
💡 Best practice for cross-timezone meetings
✅Schedule at 14:00–15:00 (SGT (Singapore)) for a 09:00–10:00 slot in AST (Riyadh) — the sweet spot where both teams are working.
✅Schedule at 15:00–16:00 (SGT (Singapore)) for a 10:00–11:00 slot in AST (Riyadh) — the sweet spot where both teams are working.
✅Schedule at 16:00–17:00 (SGT (Singapore)) for a 11:00–12:00 slot in AST (Riyadh) — the sweet spot where both teams are working.
Recurring meetings are particularly vulnerable to DST shifts. The ClockinSync Chrome Extension alerts you before the offset changes.
Install ClockinSync Free →Drag the slider at the top to convert any SGT (Singapore) time instantly. You can also type natural language like "3pm", "15:00", or a location name to get an immediate answer.