>§3.7.1 of
Network Time Protocol Best Current Practices</a>
(Internet <abbr>RFC</abbr> 8633), leap smearing is not suitable for
applications requiring accurate <abbr>UTC</abbr> or civil time,
and is intended for use only in single, well-controlled environments.</li>
<li>The <a
href="https://pairlist6.pair.net/mailman/listinfo/leapsecs">Leap
Second Discussion List</a> covers <a
href="https://www2.unb.ca/gge/Resources/gpsworld.november99.pdf">McCarthy
and Klepczynski’s 1999 proposal to discontinue leap sec