Hi,

I hope this is the appropriate list for questions about the leap-seconds file.

It seems the `leap-seconds.list` file hosted on the IANA server [1] is about to expire on 28 December 2025, and its latest update NTP timestamp (01 July 2025) appears to be older than the timestamp on the upstream bulletin [2] (07 July 2025). The obspm.fr servers also appear to host a leap-seconds.list file [3] with an expiry date of 28 June 2026.

With the current expiry date approaching, I was wondering if the IANA-hosted file will be updated to have an expiry date in the future.

As a side note, the leap-seconds.list file shipped in tzdata on Debian [4] already seems to use the 2026 expiry date.

[1] https://data.iana.org/time-zones/tzdb/leap-seconds.list
[2] https://hpiers.obspm.fr/iers/bul/bulc/bulletinc.dat
[3] https://hpiers.obspm.fr/iers/bul/bulc/ntp/leap-seconds.list
[4] https://sources.debian.org/src/tzdata/2025b-0%2Bdeb12u2/leap-seconds.list

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Kind regards

Marcus van Dam

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