JST to IRKT time converter

IRKT is 1 hour behind JST. When it is 9:00 AM in JST, it is 8:00 AM in IRKT.

JST UTC+9

Saturday, October 17, 2026

IRKT UTC+8

Saturday, October 17, 2026

JST
Japan Standard Time
Sat, Oct 17
UTC+9
IRKT
Irkutsk Time
Sat, Oct 17
UTC+8-1h
Finding your time zone…
Shared working hours (9:00–18:00)

JST to IRKT conversion table

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

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

Best time to call or meet

Both sides are at work from 10:00 AM – 6:00 PM in JST (9:00 AM – 5:00 PM in IRKT).

Daylight saving time and the difference

The difference stays 1 hour all year.

More conversions

IRKT to JSTJST to UTCJST to GMTJST to ESTJST to CSTJST to MSTJST to PSTJST to CETJST to MSKJST to GSTJST to PKTJST to ISTJST to SGT
UTC to IRKTGMT to IRKTEST to IRKTCST to IRKTMST to IRKTPST to IRKTCET to IRKTMSK to IRKTGST to IRKTPKT to IRKTIST to IRKTSGT to IRKT

Questions and answers

What is the time difference between JST and IRKT?

IRKT is 1 hour behind JST.

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

When it is 9:00 AM in JST, it is 8:00 AM in IRKT.

When is the best time to call IRKT from JST?

Both sides are at work from 10:00 AM – 6:00 PM in JST (9:00 AM – 5:00 PM in IRKT).

Does the time difference between JST and IRKT change?

No. The difference stays 1 hour all year.