Convert JST to HDT Time
Free online converter with current times, time difference, and conversion table between JST and HDT time zones.
Current time in JST: Loading...
Current time in HDT: Loading...
Time difference: -18 hours
JST to HDT Conversion Table
This table shows common JST times converted to HDT time:
About JST and HDT Time Zones
JST Time Zone
Full Name: Japan Standard Time
UTC Offset: UTC+9
Current Time: Loading...
Standard time in Japan.
Used in: Japan
HDT Time Zone
Full Name: Hawaii Daylight Time
UTC Offset: UTC-9
Current Time: Loading...
Historically used daylight saving time in Hawaii.
Used in: USA (Hawaii - historical)
How to Convert JST to HDT
Enter JST Time
Enter the JST time you want to convert using the time picker or by typing directly in 24-hour format.
Click Convert
Click the "Convert Time" button to perform the conversion from JST to HDT.
View Result
The equivalent HDT time will be displayed, along with the time difference between the two zones.
Use Conversion Table
For quick reference, you can also use the conversion table below that shows common JST times converted to HDT.
Common Uses for JST to HDT Conversion
International Business
Schedule meetings and calls between locations in Japan and USA (Hawaii - historical) time zones.
Travel Planning
Calculate arrival times and plan activities when traveling between Japan and USA (Hawaii - historical).
Event Scheduling
Convert event times for international broadcasts, webinars, or sports events between these regions.
Keeping in Touch
Find the best times to call friends, family, or colleagues across these time zones.
Frequently Asked Questions
The time difference between JST and HDT is -18 hours. This means that when it's noon (12:00 PM) in JST, it's 6:00 PM in HDT.
To convert JST to HDT time, subtract 18 hours from the JST time. You can use our converter at the top of this page for instant and accurate conversions.
JST does not observe DST. HDT does not observe DST.
Minimal overlap in business hours.
Our converter uses standard time zone offsets. For the most accurate conversions during DST transition periods, please verify the exact dates when DST begins or ends in the relevant regions, as these can vary by year and location.