Japan Standard Time announcement archive

July 5, 2024

No leap second adjustment on January 1, 2025

April 1, 2024

The Time Dissemination by Telephone(TEL-JJY) ended on March 31, 2024

January 9, 2024

No leap second adjustment on July 1, 2024

October 25, 2023

Information about the temporary outages of transmission at Hagane-yama LF Standard Time and Frequency Transmission Station due to the renewal of airplane warning lights.(Links to the Japanese page)

August 29, 2023

Periodic maintenance of facilities in the LF Standard Time and Frequency Transmission Stations will be performed as informed.(Links to the Japanese page)

August 20, 2023

Periodic maintenance of facilities in the LF Standard Time and Frequency Transmission Stations will be performed as informed.(Links to the Japanese page)

July 10, 2023

No leap second adjustment on January 1, 2024

March 15, 2023

Telephone JJY service will be discontinued end of March 2024

January 10, 2023

No leap second adjustment on July 1, 2023

July 6, 2022

No leap second adjustment on January 1, 2023

March 9, 2020

NTP service trial started in Kobe

January 28, 2019

Telephone JJY service will be discontinued end of March 2024