How to read it
Riyadh and Hong Kong, side by side
Each row is one city's day, half an hour to a square, lined up by the hours along the bottom.
- 1Filled: at the desk, 9:00 to 18:00 where that city is.
- 2Grey: up early, up late, or the weekend.
- 3Outline: asleep.
- 4Red band: your slot. Read straight down to see the same moment in every city.
- 5A marks the best time for everyone; B, when there is one, the next best.
The red band is the best time to call on Wed, 21 Oct 2026: 09:00–10:00 in Riyadh, which is 14:00–15:00 in Hong Kong.
Through the year
How the gap between Riyadh and Hong Kong moves
Hong Kong is 5h ahead of Riyadh today. Neither city changes its clocks, so the gap is the same all year.
- Hong Kong 5h ahead of Riyadh
Hour by hour
Riyadh to Hong Kong time, hour by hour
On a working day (Wed, 21 Oct 2026), with working hours of 9:00 to 18:00 in both cities. Riyadh works Sun–Thu and Hong Kong works Mon–Fri, so the shared working days are Mon–Thu.
- Riyadh starts work 09:00 14:00 in Hong Kong At desk
- Hong Kong starts work 09:00 04:00 in Riyadh Asleep
- Riyadh finishes work 18:00 23:00 in Hong Kong Asleep
- Hong Kong finishes work 18:00 13:00 in Riyadh At desk
Show all 24 hours
| Riyadh | Hong Kong |
|---|---|
| 00:00 Asleep | 05:00 Asleep |
| 01:00 Asleep | 06:00 Asleep |
| 02:00 Asleep | 07:00 Early |
| 03:00 Asleep | 08:00 Early |
| 04:00 Asleep | 09:00 At desk |
| 05:00 Asleep | 10:00 At desk |
| 06:00 Asleep | 11:00 At desk |
| 07:00 Early | 12:00 At desk |
| 08:00 Early | 13:00 At desk |
| 09:00 At desk | 14:00 At desk |
| 10:00 At desk | 15:00 At desk |
| 11:00 At desk | 16:00 At desk |
| 12:00 At desk | 17:00 At desk |
| 13:00 At desk | 18:00 Late |
| 14:00 At desk | 19:00 Late |
| 15:00 At desk | 20:00 Late |
| 16:00 At desk | 21:00 Late |
| 17:00 At desk | 22:00 Asleep |
| 18:00 Late | 23:00 Asleep |
| 19:00 Late | 00:00 Thu Asleep |
| 20:00 Late | 01:00 Thu Asleep |
| 21:00 Late | 02:00 Thu Asleep |
| 22:00 Asleep | 03:00 Thu Asleep |
| 23:00 Asleep | 04:00 Thu Asleep |
Questions
Questions people ask
What is the time difference between Riyadh and Hong Kong?
Hong Kong is 5h ahead of Riyadh (as of Wed, 21 Oct 2026). Neither city changes its clocks, so the gap is the same all year.
What is the best time for a call between Riyadh and Hong Kong?
On a working day, the best time for a call is 09:00–10:00 in Riyadh, which is 14:00–15:00 in Hong Kong. Everyone is at their desk. Riyadh works Sun–Thu and Hong Kong works Mon–Fri, so the shared working days are Mon–Thu.
Does Riyadh change its clocks?
No. Riyadh stays on UTC+3 all year.
Does Hong Kong change its clocks?
No. Hong Kong stays on UTC+8 all year.
More city pairs
Compare more cities
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Hong Kong and…
- Hong Kong and Mumbai
- Hong Kong and Delhi
- Hong Kong and Bengaluru
- Hong Kong and Dubai
- Hong Kong and Abu Dhabi
- Hong Kong and Doha
- Hong Kong and Singapore
- Hong Kong and Tokyo
- Hong Kong and Sydney
- Hong Kong and London
- Hong Kong and Paris
- Hong Kong and Berlin
- Hong Kong and Amsterdam
- Hong Kong and New York
- Hong Kong and Toronto
- Hong Kong and Chicago
- Hong Kong and Los Angeles
- Hong Kong and San Francisco
From the team behind 10:10
Running an event across time zones?
C4E has spent twenty years running conferences, dealer meets and offsites in more than 40 countries, with clients, speakers and crews in different time zones. 10:10 is one of the tools we built for our own shows. It is free, with no account and nothing upsold.