Daylight Saving Time
Very often radio clocks have bugs in their software relating to daylight saving time (DST). This often leads to clocks not updating themselves to the correct civil local time when DST transitions on to off or off to on. Clocks that interpret longwave stations tend to be the most affected due to very minimal low level software (often hand coded assembler, or compiled C) used to decode and display the time signal.
On some systems, notably WWVB, DST is much less an issue because part of the transmitted timecode contains a "DST is now in effect" flag. Therefore even if a change in law occurs which changes the transition days (the most common change), the transmitted timecode will be updated and the clock's software only needs to pay attention to this DST flag. The only change which would typically cause DST transition problems would be if the transition time were to change (e.g. 0200 hours local time).
Read more about this topic: Radio Clock
Famous quotes containing the words daylight, saving and/or time:
“By evening she was back in love again,
though not so wholly but throughout the night
she woke sometimes to feel the daylight coming
like a relentless milkman up the stairs.”
—Adrienne Rich (b. 1929)
“You begin saving the world by saving one man at a time; all else is grandiose romanticism or politics.”
—Charles Bukowski (1920–1994)
“Slow, slow, fresh fount, keep time with my salt tears;
Yet slower yet, oh faintly gentle springs:
List to the heavy part the music bears,
“Woe weeps out her division when she sings.”
Droop herbs and flowers;
Fall grief in showers;
“Our beauties are not ours”:
Oh, I could still,
Like melting snow upon some craggy hill,
Drop, drop, drop, drop,
Since nature’s pride is, now, a withered daffodil.”
—Ben Jonson (1572–1637)