JST to HST Converter
HST is 19 hours behind JST
JST to HST Conversion Table
Green rows indicate standard business hours (9 AM – 5 PM) in HST
| JST | HST |
|---|---|
| 12:00 AM | 5:00 AM -1d |
| 1:00 AM | 6:00 AM -1d |
| 2:00 AM | 7:00 AM -1d |
| 3:00 AM | 8:00 AM -1d |
| 4:00 AM | 9:00 AM -1d |
| 5:00 AM | 10:00 AM -1d |
| 6:00 AM | 11:00 AM -1d |
| 7:00 AM | 12:00 PM -1d |
| 8:00 AM | 1:00 PM -1d |
| 9:00 AM | 2:00 PM -1d |
| 10:00 AM | 3:00 PM -1d |
| 11:00 AM | 4:00 PM -1d |
| 12:00 PM | 5:00 PM -1d |
| 1:00 PM | 6:00 PM -1d |
| 2:00 PM | 7:00 PM -1d |
| 3:00 PM | 8:00 PM -1d |
| 4:00 PM | 9:00 PM -1d |
| 5:00 PM | 10:00 PM -1d |
| 6:00 PM | 11:00 PM -1d |
| 7:00 PM | 12:00 AM |
| 8:00 PM | 1:00 AM |
| 9:00 PM | 2:00 AM |
| 10:00 PM | 3:00 AM |
| 11:00 PM | 4:00 AM |
Converting Japan Standard Time to Hawaii Standard Time
Japan Standard Time (JST) and Hawaii Standard Time (HST) are separated by a 19 hours time difference. HST is 19 hours behind JST. JST is UTC+9, used in Japan, while HST is UTC-10, used in United States.
When converting from JST to HST, the key reference points to remember are: 9:00 AM JST equals 2:00 PM HST, 12:00 PM noon JST equals 5:00 PM HST, and 5:00 PM JST equals 10:00 PM HST. The conversion table above shows every hour of the day mapped between these two time zones.
Scheduling Across JST and HST
For professionals scheduling meetings between JST and HST, finding overlapping business hours is essential. Standard business hours are typically 9:00 AM to 5:00 PM in each time zone. Given the 19 hours difference, the window of overlap may be limited, making early morning or late evening calls necessary for one party. Use the highlighted working hours in the conversion table above to quickly identify suitable meeting times.
Daylight Saving Time Considerations
JST does not observe Daylight Saving Time, maintaining UTC+9 year-round. HST does not observe DST, staying at UTC-10 year-round.