HST to JST time converter

JST is 19 hours ahead of HST. When it is 9:00 AM in HST, it is 4:00 AM (Sat, Oct 17) in JST.

HST UTC-10

Friday, October 16, 2026

JST UTC+9

Saturday, October 17, 2026

HST
Hawaii-Aleutian Standard Time
Fri, Oct 16
UTC-10
JST
Japan Standard Time
Sat, Oct 17
UTC+9+19h
Finding your time zone…
Shared working hours (9:00–18:00)

HST to JST conversion table

Every hour of today in HST and the matching time in JST. Light rows are typical working hours (9:00–18:00).

HSTJST
12:00 AM7:00 PM
1:00 AM8:00 PM
2:00 AM9:00 PM
3:00 AM10:00 PM
4:00 AM11:00 PM
5:00 AM12:00 AM+1 day
6:00 AM1:00 AM+1 day
7:00 AM2:00 AM+1 day
8:00 AM3:00 AM+1 day
9:00 AM4:00 AM+1 day
10:00 AM5:00 AM+1 day
11:00 AM6:00 AM+1 day
12:00 PM7:00 AM+1 day
1:00 PM8:00 AM+1 day
2:00 PM9:00 AM+1 day
3:00 PM10:00 AM+1 day
4:00 PM11:00 AM+1 day
5:00 PM12:00 PM+1 day
6:00 PM1:00 PM+1 day
7:00 PM2:00 PM+1 day
8:00 PM3:00 PM+1 day
9:00 PM4:00 PM+1 day
10:00 PM5:00 PM+1 day
11:00 PM6:00 PM+1 day

Best time to call or meet

Both sides are at work from 2:00 PM – 6:00 PM in HST (9:00 AM – 1:00 PM in JST).

Daylight saving time and the difference

The difference stays 19 hours all year.

More conversions

JST to HSTHST to UTCHST to GMTHST to ESTHST to CSTHST to MSTHST to PSTHST to CETHST to MSKHST to GSTHST to PKTHST to ISTHST to SGT
UTC to JSTGMT to JSTEST to JSTCST to JSTMST to JSTPST to JSTCET to JSTMSK to JSTGST to JSTPKT to JSTIST to JSTSGT to JST

Questions and answers

What is the time difference between HST and JST?

JST is 19 hours ahead of HST.

What time is it in JST when it is 9 AM in HST?

When it is 9:00 AM in HST, it is 4:00 AM (Sat, Oct 17) in JST.

When is the best time to call JST from HST?

Both sides are at work from 2:00 PM – 6:00 PM in HST (9:00 AM – 1:00 PM in JST).

Does the time difference between HST and JST change?

No. The difference stays 19 hours all year.