A New Internet-Draft is available from the on-line Internet-Drafts directories.
Title : Coordinated Universal Time with Smoothed Leap Seconds (UTC-SLS)
Author(s) : M. Kuhn
Filename : draft-kuhn-leapsecond-00.txt
Pages : 15
Date : 2006-1-18
Coordinated Universal Time (UTC) is the international standard
timescale used in many Internet protocols. UTC features occasional
single-second adjustments, known as "leap seconds". These happen at
the end of announced UTC days, in the form of either an extra second
23:59:60 or a missing second 23:59:59. Both events need special
consideration in UTC-synchronized systems that represent time as a
scalar value. This specification defines UTC-SLS, a minor variation
of UTC that lacks leap seconds. Instead, UTC-SLS performs an
equivalent "smooth" adjustment, during which the rate of the clock
temporarily changes by 0.1% for 1000 seconds. UTC-SLS is a drop-in
replacement for UTC. UTC-SLS can be generated from the same
information as UTC. It can be used with any specification that
refers to UTC but lacks provisions for leap seconds. UTC-SLS
provides a robust and interoperable way for networked UTC-
synchronized clocks to handle leap seconds. By providing UTC-SLS
instead of UTC to applications, operating systems can free most
application and protocol designers from any need to even know about
UTC leap seconds.
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