JST to UTC-1 time converter

UTC-1 is 10 hours behind JST. When it is 9:00 AM in JST, it is 11:00 PM (Mon, Oct 19) in UTC-1.

JST UTC+9

Tuesday, October 20, 2026

UTC-1 UTC-1

Monday, October 19, 2026

JST
Japan Standard Time
Tue, Oct 20
UTC+9
UTC-1
Mon, Oct 19
UTC-1-10h
Finding your time zone…
Shared working hours (9:00–18:00)

JST to UTC-1 conversion table

Every hour of today in JST and the matching time in UTC-1. Light rows are typical working hours (9:00–18:00).

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

Best time to call or meet

Working hours don't overlap fully. The closest fit is 5:00 PM – 6:00 PM in JST (7:00 AM – 8:00 AM in UTC-1): working hours on one side, early or late on the other.

Daylight saving time and the difference

The difference stays 10 hours all year.

More conversions

UTC-1 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 UTC-1GMT to UTC-1EST to UTC-1CST to UTC-1MST to UTC-1PST to UTC-1CET to UTC-1MSK to UTC-1GST to UTC-1PKT to UTC-1IST to UTC-1SGT to UTC-1

Questions and answers

What is the time difference between JST and UTC-1?

UTC-1 is 10 hours behind JST.

What time is it in UTC-1 when it is 9 AM in JST?

When it is 9:00 AM in JST, it is 11:00 PM (Mon, Oct 19) in UTC-1.

When is the best time to call UTC-1 from JST?

Working hours don't overlap fully. The closest fit is 5:00 PM – 6:00 PM in JST (7:00 AM – 8:00 AM in UTC-1): working hours on one side, early or late on the other.

Does the time difference between JST and UTC-1 change?

No. The difference stays 10 hours all year.