Skip to content
DateAlmanac

What is HST in JST?

Japan Standard Time is 19 hours ahead

Hawaii Standard Time is on UTC−10:00 and Japan Standard Time is on UTC+9:00 right now. That gap holds all year, because neither zone observes daylight saving.

Convert a time

JST — Japan Standard Time

5:00 pm

JST, Sat, the next day

Time in Honolulu
10:30:06 PM
Time in Tokyo
5:30:06 PM
Difference
+19 h
Next clock change
Neither zone

Daylight saving

Hawaii Standard Time

No clock changes

Hawaii Standard Time stays on HST all year, so its offset from UTC never moves.

Japan Standard Time

No clock changes

Japan Standard Time stays on JST all year, so its offset from UTC never moves.

HST to JST conversion table

Every hour of Friday, November 6, 2026, converted from Hawaii Standard Time to Japan Standard Time. 19 of the 24 hours fall on a different calendar day in Tokyo, which is marked.

12:00 am HST
7:00 pm JST
1:00 am HST
8:00 pm JST
2:00 am HST
9:00 pm JST
3:00 am HST
10:00 pm JST
4:00 am HST
11:00 pm JST
5:00 am HST
12:00 am JST+1 day
6:00 am HST
1:00 am JST+1 day
7:00 am HST
2:00 am JST+1 day
8:00 am HST
3:00 am JST+1 day
9:00 am HST
4:00 am JST+1 day
10:00 am HST
5:00 am JST+1 day
11:00 am HST
6:00 am JST+1 day
12:00 pm HST
7:00 am JST+1 day
1:00 pm HST
8:00 am JST+1 day
2:00 pm HST
9:00 am JST+1 day
3:00 pm HST
10:00 am JST+1 day
4:00 pm HST
11:00 am JST+1 day
5:00 pm HST
12:00 pm JST+1 day
6:00 pm HST
1:00 pm JST+1 day
7:00 pm HST
2:00 pm JST+1 day
8:00 pm HST
3:00 pm JST+1 day
9:00 pm HST
4:00 pm JST+1 day
10:00 pm HST
5:00 pm JST+1 day
11:00 pm HST
6:00 pm JST+1 day

Scheduling between the two

Working hours overlap from 2:00 pm to 6:00 pm HST, which is 9:00 am to 1:00 pm JST. Anything inside that window falls in the normal working day at both ends.

Hawaii Standard Time (HST) is used in all of Hawaii, which does not observe daylight saving

Other conversions