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Promptly after fixing the previus leapsecond file I get the IERS Bulletin C number 49 today which states:UTC TIME STEP on the 1st of July 2015 A positive leap second will be introduced at the end of June 2015. The sequence of dates of the UTC second markers will be: 2015 June 30, 23h 59m 59s 2015 June 30, 23h 59m 60s 2015 July 1, 0h 0m 0sAnd I notice the IETF seems to update the canonical leap-seconds file about two months after the decision is made by the IERS. It's a good thing ntpd starts complaining when the file is about to expire. Update 2015-01-06: An update was available from ftp://time.nist.gov/ but only when I connected over IPv6. An interesting form of IPv6 promotion. Notice the difference in messages between the old file and the new file loading:Jan 5 13:54:33 ritchie ntpd: leapsecond file ('/etc/ntp/leap-seconds.3644438400'): good hash signature Jan 5 13:54:33 ritchie ntpd: leapsecond file ('/etc/ntp/leap-seconds.3644438400'): loaded, expire=2015-06-28T00:00Z ofs=35 (no entries after build date)Jan 6 10:14:17 ritchie ntpd: leapsecond file ('/etc/ntp/leap-seconds.3629404800'): good hash signature Jan 6 10:14:17 ritchie ntpd: leapsecond file ('/etc/ntp/leap-seconds.3629404800'): loaded, expire=2015-12-28T00:00Z last=2015-07-01T00:00Z ofs=36