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Re: Determining the dayname for the last day of any given month

by greenFox (Vicar)
on Jun 19, 2006 at 12:10 UTC ( #556236=note: print w/replies, xml ) Need Help??


in reply to Determining the dayname for the last day of any given month

Date::Calc's Day_of_Week function will do exactly what you want. I have the following snippet which I used once before when I could not install Date::Calc. Unfortunately I did not record it's provenance and I googled around and couldn't find it :( I seem to recall it coming from one of our esteemed monks though...

# Return the day (1..7) that the first day of the given month/year fal +ls # on. Uses "Zeller's Confluence", which I don't claim to understand. # sub Day_of_Week { my($year, $month, $day) = @_; # $month in (1..12), $year as YYYY $month-=1; if ( $month < 2 ) { $month += 12; --$year; } my $z1 = (26 * ($month + 2)) / 10; my $z2 = int((125 * $year) / 100); my $day_of_week = ($z1 + $z2 - int($year / 100) + int($year / 400)) +% 7; return $day_of_week ? $day_of_week : 7; }

It would need a wrapper to do what you want, subtract one (previous day) and wrap to seven if result zero...

--
Do not seek to follow in the footsteps of the wise. Seek what they sought. -Basho

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[Corion]: marto: Well, I think they go a tour every two years and I think it's hard to even get a connection with the crowd at a 20k people concert... But maybe after this time I'll stop too ;)
[Corion]: I still have to see the Pet Shop Boys live before they stop touring at all
[marto]: yeah, I think that as a group creatively they're done. I can understand how it'd be hard to stop the process, album/tour, album/tour, if that's pretty much all you've ever done :)
[marto]: Corion yes I saw them Pandemonium_Tour
[Corion]: marto: Yeah, and I doubt that they'll ever get back to something like Violator/Songs of Faith and Devotion - it would either alienate their "regular" crowd, or be "too much Violator" ;)
LanX needs to see Freddy Mercury'
[Corion]: marto: Yeah, I have that on DVD even, and I missed them last year because I was in London at the time ironically ;)
[marto]: put me in the mood to listen to this now :)
[Corion]: LanX: Well, grab a shovel :)
[Corion]: Kraftwerk also are still touring (well, only Ralf Hütter and Florian Schneider), but I'm too tight fisted to spend EUR 150+ for standing around two hours ;)

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