Peter - thanks very much. I'll use the GMT trick. John
> -----Original Message----- > From: Peter Scott [mailto:[EMAIL PROTECTED] > Sent: 23 November 2004 04:14 > To: [EMAIL PROTECTED] > Subject: RE: Date calculations and daylight saving > > In article <[EMAIL PROTECTED]>, > [EMAIL PROTECTED] (John Bruin) writes: > >> From: Bob Showalter [mailto:[EMAIL PROTECTED] > >> If you switch from daylight savings time at 2am on Sunday, October > >> 31, then the difference between the local times of noon on > Saturday > >> the 30th and noon on Sunday the 31st is 25 hours, not 24 hours. If > >> you're expecting it to be > >> 24 hours, that's not correct. > > > >Yes this is exactly what I am try to do. I am working out > how long jobs > >take to complete and I need 1 day to equal 24 hrs and a week > to equal > >168 hrs regardless of daylight saving change overs. We used to use a > >spreadsheet for this calculation and that's what we're trying to > >duplicate. Technically inaccurate yes but for our purposes > it gives the expected result. > > Okay, well then you can either lie about whether you're in a > daylight saving time zone: > > % perl -MDate::Parse -le 'print str2time("Sun Oct 31 01:00:00 > PST 2004") \ > - str2time("Sat Oct 30 23:00:00 > PST 2004")' > 7200 > > vs. what you don't want: > > % perl -MDate::Parse -le 'print str2time("Sun Oct 31 01:00:00 > PST 2004") \ > - str2time("Sat Oct 30 23:00:00 > PDT 2004")' > 10800 > > Or you can just make the timezone the never-changing GMT: > > % perl -MDate::Parse -le 'print str2time("Sun Oct 31 01:00:00 > GMT 2004") \ > - str2time("Sat Oct 30 23:00:00 > GMT 2004")' > 7200 > > -- > Peter Scott > http://www.perldebugged.com/ > *** NEW *** http://www.perlmedic.com/ > > > > -- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > <http://learn.perl.org/> <http://learn.perl.org/first-response> > > > > -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] <http://learn.perl.org/> <http://learn.perl.org/first-response>
