On Mon, Sep 3, 2012 at 8:28 AM, Lester Caine <les...@lsces.co.uk> wrote:
> Derick Rethans wrote: > >> You have an accurate representation of the ISO format - which does not >>> >specify the string representation of a timezone, but rather the offset >>> of >>> >UTC. This is not lossy. >>> >> Yes it is! You can't go back from an UTC offset to a timezone string. >> Hence: lossy. >> > > Exactly ... > > Will - if you are displaying a date, and then looking for a UTC time 6 > months later you need the daylight saving setting. Personally I get around > this problem by displaying a 'local client time' based on extra details > provided by the client login. A server default is never going to be the > right answer unless you simply switch off ALL timezone working and only use > local time, in which case your proposal could work - as long as it NEVER > displays offsets. Most problems on systems that DO require to correctly > manage timezone shifted data come about by not running the server with a > fixed UTC clock and then trying to map things across different timezones. > In this situation, the browser time offset is useless and the main reason > that Derick is flagging ISO format as lossy. It can never give you the > correct data in six months time where daylight saving shifts comes in and > using it here is just exacerbating that problem by continuing to reinforce > a wrong 'standard'. > > So the server 'default' local time needs to work of extra timezone data > rather than the local clock. Any display MUST then show timezone rather > than just an arbitrary offset or simply UTC time ... with a UTC flag to > confirm that. Hi, Lester - I'll update the patch and RFC to include this format. This is the format I'll use unless others have a better approach: 2012-09-01T00:00:00-0500 (America/Chicago) > > > -- > Lester Caine - G8HFL > ----------------------------- > Contact - > http://lsces.co.uk/wiki/?page=**contact<http://lsces.co.uk/wiki/?page=contact> > L.S.Caine Electronic Services - http://lsces.co.uk > EnquirySolve - http://enquirysolve.com/ > Model Engineers Digital Workshop - http://medw.co.uk > Rainbow Digital Media - > http://rainbowdigitalmedia.co.**uk<http://rainbowdigitalmedia.co.uk> > > > > -- > PHP Internals - PHP Runtime Development Mailing List > To unsubscribe, visit: http://www.php.net/unsub.php > >
