Offset
The time difference between Japan Standard Time and Hawaii Time is 19 hours.
Japan Standard Time (JST) is ahead of Hawaii Time (HST).
JST: UTC+9
HST: UTC-10
Neither Japan Standard Time nor Hawaii Time is currently observing daylight saving time.
When to schedule
Standard business hours (9 AM–5 PM, Mon–Fri) in Japan Standard Time and Hawaii Time don't overlap on the same weekday. Hawaii Time is 19 hours behind Japan Standard Time.
Realistic options: hand off asynchronously, or stretch one side by an hour to catch the other team at the start or end of their day.
Public holidays in 2026
National public holidays can affect availability — a counterpart is likely off work on their own holidays, so it's worth planning meetings and deadlines around them.
Japan
- New Year's DayThu, Jan 1
- Coming of Age DayMon, Jan 12
- Foundation DayWed, Feb 11
- The Emperor's BirthdayMon, Feb 23
- Vernal Equinox DayFri, Mar 20
- Shōwa DayWed, Apr 29
- Constitution Memorial DayWed, May 6
- Greenery DayMon, May 4
- Children's DayTue, May 5
- Marine DayMon, Jul 20
- Mountain DayTue, Aug 11
- Respect for the Aged DayMon, Sep 21
- Autumnal Equinox DayWed, Sep 23
- Sports DayMon, Oct 12
- Culture DayTue, Nov 3
- Labour Thanksgiving DayMon, Nov 23
United States
- New Year's DayThu, Jan 1
- Martin Luther King, Jr. DayMon, Jan 19
- Presidents DayMon, Feb 16
- Memorial DayMon, May 25
- Juneteenth National Independence DayFri, Jun 19
- Independence DayFri, Jul 3
- Labour DayMon, Sep 7
- Columbus DayMon, Oct 12
- Veterans DayWed, Nov 11
- Thanksgiving DayThu, Nov 26
- Christmas DayFri, Dec 25
About these zones
Japan Standard Time is also known as JST. To call Japan, dial +81.
Hawaii Time is also known as HST. To call United States, dial +1.
Hawaii Time is approximately 3,850 miles east of Japan Standard Time.
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| JST | HST | Day |
|---|---|---|
| 12:00 am | 5:00 am | -1 day |
| 1:00 am | 6:00 am | -1 day |
| 2:00 am | 7:00 am | -1 day |
| 3:00 am | 8:00 am | -1 day |
| 4:00 am | 9:00 am | -1 day |
| 5:00 am | 10:00 am | -1 day |
| 6:00 am | 11:00 am | -1 day |
| 7:00 am | 12:00 pm | -1 day |
| 8:00 am | 1:00 pm | -1 day |
| 9:00 am | 2:00 pm | -1 day |
| 10:00 am | 3:00 pm | -1 day |
| 11:00 am | 4:00 pm | -1 day |
| 12:00 pm | 5:00 pm | -1 day |
| 1:00 pm | 6:00 pm | -1 day |
| 2:00 pm | 7:00 pm | -1 day |
| 3:00 pm | 8:00 pm | -1 day |
| 4:00 pm | 9:00 pm | -1 day |
| 5:00 pm | 10:00 pm | -1 day |
| 6:00 pm | 11:00 pm | -1 day |
| 7:00 pm | 12:00 am | Same day |
| 8:00 pm | 1:00 am | Same day |
| 9:00 pm | 2:00 am | Same day |
| 10:00 pm | 3:00 am | Same day |
| 11:00 pm | 4:00 am | Same day |
Daylight saving time
Neither Japan Standard Time nor Hawaii Time observes daylight saving time. The offset between these zones remains constant year-round.
See the daylight saving time page for transition dates across every time zone.
Daylight today
- Sunrise
- 4:27 AM
- Sunset
- 6:55 PM
- Day length
- 14h 28m
- Sunrise
- 5:50 AM
- Sunset
- 7:12 PM
- Day length
- 13h 22m
Daylight overlap: 9h 45m — 4:27 AM–2:12 PM in Japan Standard Time (9:27 AM–7:12 PM in Hawaii Time). Both locations are in daylight during this window.
Cities in these zones
Cities in Japan Standard Time
Cities in Hawaii Time
Browse all cities to see the current local time anywhere.
Airports in these zones
Airports in Japan Standard Time
- HND
- NRT
- ITM
- KIX
- UKB
- NGO
- NKM
- CTS
- OKD
- FUK
Airports in Hawaii Time
- HNL
Related conversions
Common conversions
- What is 9:00 am JST in HST?
- 9:00 am JST is 2:00 pm HST, the previous day.
- What is 12:00 pm JST in HST?
- 12:00 pm JST is 5:00 pm HST, the previous day.
- What is 12:30 pm JST in HST?
- 12:30 pm JST is 5:30 pm HST, the previous day.
- What is 2:00 pm JST in HST?
- 2:00 pm JST is 7:00 pm HST, the previous day.
- What is 5:00 pm JST in HST?
- 5:00 pm JST is 10:00 pm HST, the previous day.
- What is 11:30 pm JST in HST?
- 11:30 pm JST is 4:30 am HST.