Cardiff Time to JST Converter
JST is 9 hours ahead of GMT. 9:00 AM GMT = 6:00 PM JST.
JST is 9 hours ahead of GMT at the moment. To convert Cardiff Time to JST, add 9 hours to the Cardiff Time time: 9:00 AM GMT = 6:00 PM JST.
Cardiff Time (Cardiff time) is used in Cardiff, UK. JST (Japan Time) is used in Japan.
Cardiff Time to JST time conversion table
Cardiff Time to JST on 7 Nov 2026. Today's date. Highlighted rows are 9 AM–5 PM in both places.
| Cardiff Time | JST |
|---|---|
| 12:00 AM | 9:00 AM |
| 1:00 AM | 10:00 AM |
| 2:00 AM | 11:00 AM |
| 3:00 AM | 12:00 PM |
| 4:00 AM | 1:00 PM |
| 5:00 AM | 2:00 PM |
| 6:00 AM | 3:00 PM |
| 7:00 AM | 4:00 PM |
| Cardiff Time | JST |
|---|---|
| 8:00 AM | 5:00 PM |
| 9:00 AM | 6:00 PM |
| 10:00 AM | 7:00 PM |
| 11:00 AM | 8:00 PM |
| 12:00 PM | 9:00 PM |
| 1:00 PM | 10:00 PM |
| 2:00 PM | 11:00 PM |
| 3:00 PM | 12:00 AM+1 |
| Cardiff Time | JST |
|---|---|
| 4:00 PM | 1:00 AM+1 |
| 5:00 PM | 2:00 AM+1 |
| 6:00 PM | 3:00 AM+1 |
| 7:00 PM | 4:00 AM+1 |
| 8:00 PM | 5:00 AM+1 |
| 9:00 PM | 6:00 AM+1 |
| 10:00 PM | 7:00 AM+1 |
| 11:00 PM | 8:00 AM+1 |
Conversion table from Cardiff Time to JST for 7 Nov 2026. A tick marks hours that fall between 9 AM and 5 PM in both places. +1 means the next day in JST, −1 the previous day.
- ✓ marks 9 AM–5 PM in both places
- Greyed times are night in the destination (10 PM–6 AM)
How to convert Cardiff Time to JST
Add 9 hours to the Cardiff Time time to get JST.
Example: 9:00 AM GMT = 6:00 PM JST.
Across midnight: 10:00 PM GMT = 7:00 AM JST (next day). The date changes, so always check the day as well as the hour.
Time difference between Cardiff Time and JST
The time difference between Cardiff Time and JST is not the same all year, because the two sides change for daylight saving time on different dates. In 2026 it works out like this:
- 1 Jan 2026 – 28 Mar 2026: JST is 9 hours ahead of Cardiff Time.
- 29 Mar 2026 – 24 Oct 2026: JST is 8 hours ahead of Cardiff Time.
- 25 Oct 2026 – 31 Dec 2026: JST is 9 hours ahead of Cardiff Time.
Cardiff Time and JST during daylight saving time
- Cardiff Time next changes on 28 Mar 2027: clocks go forward one hour at 00:59 local time, from GMT (UTC+0) to BST (UTC+1).
- JST does not observe daylight saving time; it stays on UTC+9 all year.
Best time for a meeting between Cardiff Time and JST
Cardiff Time and JST have no shared 9 AM–5 PM window. The earliest slot that is reasonable on both sides is 7:00 AM GMT, which is 4:00 PM JST.
Cardiff Time to JST FAQ
What is the time difference between Cardiff Time and JST?
Right now JST is 9 hours ahead of GMT. The gap changes 3 times in 2026 because the two sides switch to daylight saving time on different dates.
What is 9 AM Cardiff Time in JST?
9:00 AM GMT is 6:00 PM JST.
What is 12 PM (noon) Cardiff Time in JST?
12:00 PM GMT is 9:00 PM JST.
Is JST ahead of or behind Cardiff Time?
JST is 9 hours ahead of GMT, so it is later in JST than in Cardiff Time.
Does Cardiff Time change for daylight saving time?
Yes. Cardiff Time next changes on 28 Mar 2027, when clocks go forward one hour from GMT to BST.
Does JST change for daylight saving time?
No. JST stays on the same offset all year, so conversions never shift for daylight saving time.
What is the best time for a meeting between Cardiff Time and JST?
Cardiff Time and JST have no shared 9 AM–5 PM window. The earliest slot that is reasonable on both sides is 7:00 AM GMT, which is 4:00 PM JST.
Related conversions
Convert JST to Cardiff Time
Convert Cardiff Time to other time zones
Convert other time zones to JST
Learn more
Updated 7 November 2026. Time zone data: IANA tz database.