UTC to JST converter

Coordinated Universal Time (UTC) is UTC+0 with no daylight saving. It covers the global reference used in aviation, computing and science.

Japan Standard Time (JST) is UTC+9 with no daylight saving. It covers Tokyo, Osaka and Sapporo (Seoul shares the same clock).

Japan Standard Time is typically 9 hours ahead of Coordinated Universal Time, all year round — neither zone observes daylight saving.

Best time to call Japan Standard Time from Coordinated Universal Time

There's no 9-to-5 overlap between Coordinated Universal Time and Japan Standard Time — one side always has to flex. The practical slots: 7:00 AM in Coordinated Universal Time is 4:00 PM in Japan Standard Time.