Zone & HourUTC to JST Time Converter
JST is 9 hours ahead of UTC.
UTC: Coordinated Universal Time, UTC+00:00.
JST: Japan Standard Time, UTC+09:00.
For a city that changes clocks, use the date-aware city converter.
Convert a time
9:00 AM UTC = 6:00 PM JST (same day)
24-hour UTC to JST conversion table
These are fixed-offset examples. They apply whenever the two abbreviations have the exact meanings stated above.
| UTC · UTC+00:00 | JST · UTC+09:00 | Day |
|---|---|---|
| 12:00 AM | 9:00 AM | Same day |
| 1:00 AM | 10:00 AM | Same day |
| 2:00 AM | 11:00 AM | Same day |
| 3:00 AM | 12:00 PM | Same day |
| 4:00 AM | 1:00 PM | Same day |
| 5:00 AM | 2:00 PM | Same day |
| 6:00 AM | 3:00 PM | Same day |
| 7:00 AM | 4:00 PM | Same day |
| 8:00 AM | 5:00 PM | Same day |
| 9:00 AM | 6:00 PM | Same day |
| 10:00 AM | 7:00 PM | Same day |
| 11:00 AM | 8:00 PM | Same day |
| 12:00 PM | 9:00 PM | Same day |
| 1:00 PM | 10:00 PM | Same day |
| 2:00 PM | 11:00 PM | Same day |
| 3:00 PM | 12:00 AM | Next day |
| 4:00 PM | 1:00 AM | Next day |
| 5:00 PM | 2:00 AM | Next day |
| 6:00 PM | 3:00 AM | Next day |
| 7:00 PM | 4:00 AM | Next day |
| 8:00 PM | 5:00 AM | Next day |
| 9:00 PM | 6:00 AM | Next day |
| 10:00 PM | 7:00 AM | Next day |
| 11:00 PM | 8:00 AM | Next day |
What UTC and JST mean
UTC: Coordinated Universal Time
UTC is a time standard and never shifts for daylight saving. A representative location is UTC reference, whose IANA identifier is Etc/UTC.
JST: Japan Standard Time
JST is UTC+09:00. Tokyo currently keeps this offset throughout the year. A representative location is Tokyo, whose IANA identifier is Asia/Tokyo.
Common conversion examples
- 6:00 AM UTC becomes 3:00 PM JST.
- 9:00 AM UTC becomes 6:00 PM JST.
- 12:00 PM UTC becomes 9:00 PM JST.
- 6:00 PM UTC becomes 3:00 AM JST on the next day.
- 9:00 PM UTC becomes 6:00 AM JST on the next day.
Frequently asked questions
Does this table change for daylight saving?
No. The offsets attached to these abbreviations stay fixed. A city may switch to a differently named abbreviation. UTC is not a daylight-saving designation in the interpretation used here.
Should I put an abbreviation in a meeting invitation?
Use an IANA city time zone and a full date. Abbreviations are useful shorthand when everyone agrees on the meaning, but they do not carry the complete rules that a calendar needs for recurring events.
Why can the day change?
The difference is 540 minutes. Adding or subtracting that amount can move the destination time before midnight or beyond the end of the source day. The last column makes that change explicit.