On 2025-04-22 00:28, Martin Burnicki via tz wrote:
Right now I can also access this FTP server here from Germany.
In the past I was often unable to do that, and sometimes I was unable to
access it here from Germany, but succeeded when I tried from a remote
server located in the U.S., which seems to indicate that there was a
firewall/geo-blocking problem.
Anyway, to me it looks like the IERS service is nowadays much more
reliable.
I wrote to NIST about this, and
<ftp://ftp.boulder.nist.gov/pub/time/leap-seconds.list> was updated
yesterday. Indeed it now has an expiration date of June 2026 instead of
the December 2025 expiration date of IERS's copy of the file.
Although NIST's longer expiration date would be better for TZDB, I'm
inclined to leave things along for now. That is, TZDB can continue to
source leap-seconds.list from the IERS while listing NIST as an
alternative source. This is partly due to the longstanding server
connection hassles at NIST, and partly due to my
hopefully-understandable inertia.
