Ulsan to Hong Kong: time difference
Hong Kong is 1 h behind Ulsan. Live clocks for both, the working hours they share, and how each one sits against your own time.
🇭🇰 Hong Kong, Hong Kong (China)
10
- Hong Kong Standard Time
- UTC+8
- Night
☀️ 06:21 · 🌙 17:58 · 11 h 37 min
−1 h
Your time
One day, 2 clocks
Drag along the band to read any hour in every place at once.
Ulsan 00:00 12:00 AM Hong Kong 23:00 11:00 PM You –:–
00:00 12:00 AM
Korean Standard Time · UTC+9
☀️ 06:31 · 🌙 17:47
23:00 11:00 PM
Hong Kong Standard Time · UTC+8
☀️ 06:21 · 🌙 17:58
·
−1 h
Hong Kong is 1 h behind Ulsan.
When you, Ulsan and Hong Kong are all at the desk
Pick the working hours below – the window every location shares appears once your time zone is known.
Working hours
🇰🇷 Ulsan
0 12 AM 1 1 AM 2 2 AM 3 3 AM 4 4 AM 5 5 AM 6 6 AM 7 7 AM 8 8 AM 9 9 AM 10 10 AM 11 11 AM 12 12 PM 13 1 PM 14 2 PM 15 3 PM 16 4 PM 17 5 PM 18 6 PM 19 7 PM 20 8 PM 21 9 PM 22 10 PM 23 11 PM
🇭🇰 Hong Kong
23 11 PM 0 12 AM 1 1 AM 2 2 AM 3 3 AM 4 4 AM 5 5 AM 6 6 AM 7 7 AM 8 8 AM 9 9 AM 10 10 AM 11 11 AM 12 12 PM 13 1 PM 14 2 PM 15 3 PM 16 4 PM 17 5 PM 18 6 PM 19 7 PM 20 8 PM 21 9 PM 22 10 PM
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇰🇷 Ulsan | 🇭🇰 Hong Kong |
|---|---|---|
| Local time | 00:00 | 23:00 |
| Local date | Sunday, October 18, 2026 | Saturday, October 17, 2026 |
| Time zone | Korean Standard Time | Hong Kong Standard Time |
| UTC offset | UTC+9 | UTC+8 |
| Offset from Ulsan | — | −1 h |
| IANA zone | Asia/Seoul | Asia/Hong Kong |
| Daylight saving | Not observed | Not observed |
| Sunrise | 06:31 | 06:21 |
| Sunset | 17:47 | 17:58 |
| Daylight | 11 h 16 min | 11 h 37 min |
| People on this clock | 1,129,827 | 1,367,900 |
Compare Ulsan with another city
More comparisons with Ulsan: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
Ulsan and Hong Kong: common questions
What is the time difference between Ulsan and Hong Kong?
Hong Kong is 1 hour behind: it uses UTC+8, while Ulsan is on UTC+9.
If it is 9:00 AM in Ulsan, what time is it in Hong Kong?
At 9:00 AM in Ulsan, clocks in Hong Kong show 8:00 AM.
What time is it in Hong Kong when it is 6:00 PM in Ulsan?
When it is 6:00 PM in Ulsan, it is 5:00 PM in Hong Kong.
Is there a time when both Ulsan and Hong Kong are at work?
Yes: from 10:00 AM to 6:00 PM in Ulsan (9:00 AM to 5:00 PM in Hong Kong), the working days (9:00 AM–6:00 PM) overlap.
Until what time in Ulsan is it still yesterday in Hong Kong?
Before 1:00 AM in Ulsan, the date in Hong Kong has not changed yet. From 11:00 PM in Hong Kong, it is already the next day in Ulsan.
Does the time difference between Ulsan and Hong Kong change?
No. Neither place uses daylight saving time, so the difference stays 1 hour all year.
