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DateAlmanac

What is JST in HST?

Hawaii Standard Time is 19 hours behind

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

Convert a time

HST — Hawaii Standard Time

10:00 pm

HST, Fri, the previous day

Time in Tokyo
5:30:07 PM
Time in Honolulu
10:30:07 PM
Difference
−19 h
Next clock change
Neither zone

Daylight saving

Japan Standard Time

No clock changes

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

Hawaii Standard Time

No clock changes

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

JST to HST conversion table

Every hour of Saturday, November 7, 2026, converted from Japan Standard Time to Hawaii Standard Time. 19 of the 24 hours fall on a different calendar day in Honolulu, which is marked.

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

Scheduling between the two

Working hours overlap from 9:00 am to 1:00 pm JST, which is 2:00 pm to 6:00 pm HST. 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