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Welcome to the web site of the Time & Frequency laboratory of the National Metrology Institute of South Africa (NMISA).

Announcements

From 9 April 2026, 0h UTC, the value for DUT1 is 0,0 s.
(IERS Bulletin D 146)

Latest TF Bulletins

Latest Bulletins
May 2026 - 202606.txt
April 2026 - 202605.txt
March 2026 - 202604.txt
February 2026 - 202603.txt
January 2026 - 202602.txt
December 2025 - 202601.txt
November 2025 - 202512.txt
October 2025 - 202511.txt
September 2025 - 202510.txt
August 2025 - 202509.txt
July 2025 - 202508.txt
June 2025 - 202507.txt
       
Archived copies
2026.zip
2025.zip
2024.zip
2023.zip
2022.zip
2021.zip
2020.zip
2019.zip
2018.zip
2017.zip
2016.zip
2015.zip