JST to HDT Converter
Convert time between Japan Standard Time (JST) and Hawaii Daylight Time (HDT).


Loading time converter...

Time Zone Comparison Chart

Compare the selected time across multiple time zones. Click hours in the source timezone to change time.

JST → HDT conversion table

What time it is in HDT for each hour in JST today. +1 = next calendar day

JST to HDT — 24-hour conversion
JST HDT
00:00 05:00 (2026-09-25)
01:00 06:00 (2026-09-25)
02:00 07:00 (2026-09-25)
03:00 08:00 (2026-09-25)
04:00 09:00 (2026-09-25)
05:00 10:00 (2026-09-25)
06:00 11:00 (2026-09-25)
07:00 12:00 (2026-09-25)
08:00 13:00 (2026-09-25)
09:00 14:00 (2026-09-25)
10:00 15:00 (2026-09-25)
11:00 16:00 (2026-09-25)
12:00 17:00 (2026-09-25)
13:00 18:00 (2026-09-25)
14:00 19:00 (2026-09-25)
15:00 20:00 (2026-09-25)
16:00 21:00 (2026-09-25)
17:00 22:00 (2026-09-25)
18:00 23:00 (2026-09-25)
19:00 00:00
20:00 01:00
21:00 02:00
22:00 03:00
23:00 04:00
Morning
12:00 AM JST 5:00 AM HDT +1
1:00 AM JST 6:00 AM HDT +1
2:00 AM JST 7:00 AM HDT +1
3:00 AM JST 8:00 AM HDT +1
4:00 AM JST 9:00 AM HDT +1
5:00 AM JST 10:00 AM HDT +1
6:00 AM JST 11:00 AM HDT +1
7:00 AM JST 12:00 PM HDT +1
8:00 AM JST 1:00 PM HDT +1
9:00 AM JST 2:00 PM HDT +1
10:00 AM JST 3:00 PM HDT +1
11:00 AM JST 4:00 PM HDT +1
Afternoon
12:00 PM JST 5:00 PM HDT +1
1:00 PM JST 6:00 PM HDT +1
2:00 PM JST 7:00 PM HDT +1
3:00 PM JST 8:00 PM HDT +1
4:00 PM JST 9:00 PM HDT +1
5:00 PM JST 10:00 PM HDT +1
Evening
6:00 PM JST 11:00 PM HDT +1
7:00 PM JST 12:00 AM HDT
8:00 PM JST 1:00 AM HDT
9:00 PM JST 2:00 AM HDT
10:00 PM JST 3:00 AM HDT
11:00 PM JST 4:00 AM HDT

Frequently asked questions

Use the hour-by-hour table below to see how each clock hour in Japan Standard Time (JST) maps to Hawaii Daylight Time (HDT). Offsets can change with daylight saving.

Enter a time in the converter above, or look up the matching row in the 24-hour conversion table. Both times use today's date in their respective zones.

Yes. When either zone observes DST, the offset between them can shift by an hour. The table reflects the offset for today.