Time Zone Converter | Convert JST to IRST

JST → IRST conversion table

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

JST to IRST — 24-hour conversion
JST	IRST
00:00	18:30 (2026-09-25)
01:00	19:30 (2026-09-25)
02:00	20:30 (2026-09-25)
03:00	21:30 (2026-09-25)
04:00	22:30 (2026-09-25)
05:00	23:30 (2026-09-25)
06:00	00:30
07:00	01:30
08:00	02:30
09:00	03:30
10:00	04:30
11:00	05:30
12:00	06:30
13:00	07:30
14:00	08:30
15:00	09:30
16:00	10:30
17:00	11:30
18:00	12:30
19:00	13:30
20:00	14:30
21:00	15:30
22:00	16:30
23:00	17:30

Morning

12:00 AM JST 6:30 PM IRST +1

1:00 AM JST 7:30 PM IRST +1

2:00 AM JST 8:30 PM IRST +1

3:00 AM JST 9:30 PM IRST +1

4:00 AM JST 10:30 PM IRST +1

5:00 AM JST 11:30 PM IRST +1

6:00 AM JST 12:30 AM IRST

7:00 AM JST 1:30 AM IRST

8:00 AM JST 2:30 AM IRST

9:00 AM JST 3:30 AM IRST

10:00 AM JST 4:30 AM IRST

11:00 AM JST 5:30 AM IRST

Afternoon

12:00 PM JST 6:30 AM IRST

1:00 PM JST 7:30 AM IRST

2:00 PM JST 8:30 AM IRST

3:00 PM JST 9:30 AM IRST

4:00 PM JST 10:30 AM IRST

5:00 PM JST 11:30 AM IRST

Evening

6:00 PM JST 12:30 PM IRST

7:00 PM JST 1:30 PM IRST

8:00 PM JST 2:30 PM IRST

9:00 PM JST 3:30 PM IRST

10:00 PM JST 4:30 PM IRST

11:00 PM JST 5:30 PM IRST

Frequently asked questions

Use the hour-by-hour table below to see how each clock hour in Japan Standard Time (JST) maps to Iran Standard Time (IRST). 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.

JST to IRST Converter
Convert time between Japan Standard Time (JST) and Iran Standard Time (IRST).

Time Zone Comparison Chart

JST → IRST conversion table

Frequently asked questions

Convert JST to other time zones

Convert IRST to other time zones

JST to IRST Converter Convert time between Japan Standard Time (JST) and Iran Standard Time (IRST).

Time Zone Comparison Chart

JST → IRST conversion table

Frequently asked questions

What is the time difference between JST and IRST?

How do I convert JST to IRST?

Do daylight saving changes affect this conversion?

Convert JST to other time zones

Convert IRST to other time zones

JST to IRST Converter
Convert time between Japan Standard Time (JST) and Iran Standard Time (IRST).