The daylight bit is encoded so if the National Bureau of Standards
fixed their watches, yours will be okay too.

Except my nine identical La Crosse radio wall clocks
http://home.att.net/~rhhardin3/clock01.jpg
mostly hung in pairs so as to see the lockstep seconds ticking off,
which were on sale at Kroger for $8.99 each apparently because of
a software bug, namely :

They change times perfectly, but the next UTC midnight they revert
back to the previous time, then at local 2am revert back to the
correct time. Thus changing (in lockstep) six times a year.

You can see the bug's source with a little thinking. WWV indicates
UTC daylight time; which has to be remembered in a bit somewhere until
2am local time. They got that right. But then the UTC day changes,
and the logic is screwed up, and the clock resets back until 2am local
time again.

Someday there LaCrosse clocks will be collectors' items, like the
original HP-35 calculator with the error for log(2.02). Too bad
if you sent it in to get fixed.

LaCrosse denies there's anything wrong (``the clock is probably
overloaded by the WWVB signal, which they increase in power when
they go to daylight time'' no kidding) as long as the warranty is
in effect.
--
Ron Hardin


On the internet, nobody knows you're a jerk.