JST to HST Converter

Convert between any time zones worldwide. Free and accurate time zone converter with DST support.

Edit time and date on either side to see the conversion instantly.

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JST
Japan Standard Time
Date changes are handled automatically when conversions cross midnight.
HST
Hawaii Standard Time
Date changes are handled automatically when conversions cross midnight.

Popular Timezone Conversions

CST to EST PST to EST MST to EST GMT to EST JST to EST GST to EST IST to EST EST to GMT

About JST to HST Conversion

Converting time between JST and HST requires understanding their time zone offsets and any daylight saving time adjustments. JST (JST) operates at UTC+9, while HST (HST) is set to UTC-10. This means HST is 19 hours behind JST. Note that due to the time difference, the date may change. When it's 11:13 AM JST on February 4, 2026, it's 4:13 PM HST on February 3, 2026 in HST. Use this converter to quickly find the equivalent time in HST for any time in JST, whether you're scheduling meetings, planning travel, or coordinating with teams across different time zones.

How to Use the Time Zone Converter

  1. Select your source timezone from the "From timezone" dropdown (use search to find quickly)
  2. Enter the date and time you want to convert (or click "Today" and "Now" for current time)
  3. Select your target timezone from the "To timezone" dropdown
  4. The conversion updates automatically as you change inputs - no button needed!
  5. Use "Copy" button to copy the converted time, or use presets for quick conversions

More Conversions from JST

JST to EST JST to CST JST to MST JST to MDT JST to PST JST to AKST JST to GMT JST to CET JST to EET JST to MSK JST to IST JST to CST-CHINA JST to HKT JST to SGT JST to GST JST to AEST JST to AWST JST to NZST JST to UTC JST to ART JST to BRT JST to PHT JST to BDT JST to KST JST to SAST JST to ICT JST to EAT JST to WAT JST to PKT

Frequently Asked Questions

What is the time difference between JST and HST?

The time difference between JST and HST is 19 hours. HST is 19 hours behind JST.

Is HST ahead of or behind JST?

HST is behind JST by 19 hours. When it's 12 PM in JST, it's 5:00 PM in HST.

How many hours do you add to JST to get HST?

You subtract 19 hours from JST to get HST. For example, 12 PM JST - 19 hours = 5:00 PM HST.

Does the JST to HST time difference change during Daylight Saving Time?

No, the time difference between JST and HST remains constant throughout the year. Neither timezone observes Daylight Saving Time, so the 19-hour difference stays the same.

What is 12 PM JST in HST?

12 PM JST is 5:00 PM HST. This conversion accounts for the 19-hour time difference between the two timezones.

Is JST the same throughout the year when converting to HST?

Yes, the conversion between JST and HST remains consistent throughout the year. Since neither timezone observes Daylight Saving Time, the 19-hour difference is constant, making conversions predictable and straightforward.

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