On Tue, 11 Mar 2008 04:35:14 -0300, Shmuel Metz (Seymour J.) wrote: > >>There's a paradigm shift required here. The core UNIX function, >>localtime() does not "automatically switch to and from DST." Rather, if >>localtime() is called with the same argument and with the environment >>variables having the same values, > >One of those environment variables is TZ and the spring forward/fall back >dates are optionally part of the TZ value. > Yes, but the important distinction is that, in contrast to the CVT fields, neither TZ nor any other environmental setting needs to be changed semiannualy.
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