Time::JulianDay -- Julian calendar manipulations


Time::JulianDay -- Julian calendar manipulations


        use Time::JulianDay
        $jd = julian_day($year, $month_1_to_12, $day)
        $jd = local_julian_day($seconds_since_1970);
        $jd = gm_julian_day($seconds_since_1970);
        ($year, $month_1_to_12, $day) = inverse_julian_day($jd)
        $dow = day_of_week($jd)
        print (Sun,Mon,Tue,Wed,Thu,Fri,Sat)[$dow];
        $seconds_since_jan_1_1970 = jd_secondslocal($jd, $hour, $min, $sec)
        $seconds_since_jan_1_1970 = jd_secondsgm($jd, $hour, $min, $sec)
        $seconds_since_jan_1_1970 = jd_timelocal($sec,$min,$hours,$mday,$month_0_to_11,$year)
        $seconds_since_jan_1_1970 = jd_timegm($sec,$min,$hours,$mday,$month_0_to_11,$year)


JulianDay is a package that manipulates dates as number of days since some time a long time ago. It's easy to add and subtract time using julian days...

The day_of_week returned by day_of_week() is 0 for Sunday, and 6 for Saturday and everything else is in between.


Written by David Muir Sharnoff <muir@idiom.com> with help from previous work by Kurt Jaeger aka PI <zrzr0111@helpdesk.rus.uni-stuttgart.de> based on postings from: Ian Miller <ian_m@cix.compulink.co.uk>; Gary Puckering <garyp%cognos.uucp@uunet.uu.net> based on Collected Algorithms of the ACM ?; and the unknown-to-me author of Time::Local.


Copyright (C) 1996-1999 David Muir Sharnoff. License hereby granted for anyone to use, modify or redistribute this module at their own risk. Please feed useful changes back to muir@idiom.com.

 Time::JulianDay -- Julian calendar manipulations