Information
- No leap second will be introduced on January 1, 2024. (2023/7/10)
(No leap second was introduced on July 1, 2023.) - Japan standard time distribution service over analog telephone lines (Telephone JJY) ends March 31, 2024. (2023/3/15)
- The way to register using the Hikari-telephone JJY has changed. (2022/9/1)
Topics
LF Standard Time and Frequency Transmission Station
Periodic maintenance of facilities in the LF Standard Time and Frequency Transmission Stations will be performed. (Links to a Japanese page) (2023/8/29)
- Transmission Information of JJY signals (Japanese version only)
Contents
Welcome to Japan Standard Time (JST) Group. JST Group plays an important role in the Generation, Comparison, and Dissemination of Japan Standard Time and Frequency standard. Please choose the contents you'd like to use.
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