I solved the problem by adjusting /etc/timezone and /etc/localtime to use PST8PDT instead of SystemV/PST8PDT.
On Mon, 7 Apr 1997, I wrote: > The time change was the other night, but my machine still says PST > which is an hour behind the correct PDT. My CMOS clock is set to GMT. > Any suggestions? Do I need to update the timezone package?