Brooks Harris via tz <tz@iana.org> writes: > That's true for most users. But not necessarily for special cases.
> For example, some professional video facilities might find it better to > ignore DST shifts to avoid discontinuities in the SMPTE video timecode, > which cannot tolerate a DST shift in some cases, essentially choosing to > run "permanent stand time". Yes, the display time would not match the > local wall clock in summer time, but that is less important than > continuous uninterrupted time. EST5EDT and the others (PST8PDT and > such) give administrators that option. I'm maintaining it in my work for > that reason. I don't understand. The historical System V EST5EDT and PST8PDT zones certainly had daylight saving time changes, just on a different schedule than current US time zones. -- Russ Allbery (ea...@eyrie.org) <https://www.eyrie.org/~eagle/>
