TimeToZone

JST to HST Converter

HST is 19 hours behind JST. 9:00 AM JST = 2:00 PM HST (previous day).

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JSTfrom
Japan Standard Time
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HST
Hawaii-Aleutian Standard Time
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HST is 19 hours behind JST. To convert JST to HST, subtract 19 hours from the JST time: 9:00 AM JST = 2:00 PM HST (previous day).

JST (Japan Time) is used in Japan. HST (Hawaii-Aleutian Time) is used in Hawaii (all year, no daylight saving time).

JST to HST time conversion table

JST to HST on 7 Nov 2026. Today's date. Highlighted rows are 9 AM–5 PM in both places.

JSTHSTDay
12:00 AM JST5:00 AM HSTprevious day
1:00 AM JST6:00 AM HSTprevious day
2:00 AM JST7:00 AM HSTprevious day
3:00 AM JST8:00 AM HSTprevious day
4:00 AM JST9:00 AM HSTprevious day
5:00 AM JST10:00 AM HSTprevious day
6:00 AM JST11:00 AM HSTprevious day
7:00 AM JST12:00 PM HSTprevious day
8:00 AM JST1:00 PM HSTprevious day
9:00 AM JST2:00 PM HSTwork hours
10:00 AM JST3:00 PM HSTwork hours
11:00 AM JST4:00 PM HSTwork hours
12:00 PM JST5:00 PM HSTprevious day
1:00 PM JST6:00 PM HSTprevious day
2:00 PM JST7:00 PM HSTprevious day
3:00 PM JST8:00 PM HSTprevious day
4:00 PM JST9:00 PM HSTprevious day
5:00 PM JST10:00 PM HSTprevious day
6:00 PM JST11:00 PM HSTprevious day
7:00 PM JST12:00 AM HSTnight
8:00 PM JST1:00 AM HSTnight
9:00 PM JST2:00 AM HSTnight
10:00 PM JST3:00 AM HSTnight
11:00 PM JST4:00 AM HSTnight
  • Work rows — 9 AM–5 PM in both places
  • Night in the destination (10 PM–6 AM)

How to convert JST to HST

Subtract 19 hours from the JST time to get HST.

Example: 9:00 AM JST = 2:00 PM HST (previous day).

Across midnight: 1:00 AM JST = 6:00 AM HST (previous day). The date changes, so always check the day as well as the hour.

Time difference between JST and HST

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

JST and HST during daylight saving time

  • JST does not observe daylight saving time; it stays on UTC+9 all year.
  • HST does not observe daylight saving time; it stays on UTC−10 all year.

Best time for a meeting between JST and HST

JST and HST have no shared 9 AM–5 PM window. The earliest slot that is reasonable on both sides is 7:00 AM JST, which is 12:00 PM HST.

Plan a meeting across more time zones.

JST to HST FAQ

What is the time difference between JST and HST?

HST is 19 hours behind JST all year. 9:00 AM JST = 2:00 PM HST (previous day).

What is 9 AM JST in HST?

9:00 AM JST is 2:00 PM HST (previous day).

What is 12 PM (noon) JST in HST?

12:00 PM JST is 5:00 PM HST (previous day).

Is HST ahead of or behind JST?

HST is 19 hours behind JST, so it is earlier in HST than in JST.

Does JST change for daylight saving time?

No. JST stays on the same offset all year, so conversions never shift for daylight saving time.

Does HST change for daylight saving time?

No. HST stays on the same offset all year, so conversions never shift for daylight saving time.

What is the best time for a meeting between JST and HST?

JST and HST have no shared 9 AM–5 PM window. The earliest slot that is reasonable on both sides is 7:00 AM JST, which is 12:00 PM HST.

Related conversions

Convert HST to JST

Convert JST to other time zones

Convert other time zones to HST

Learn more

Updated 7 November 2026. Time zone data: IANA tz database.