date subtraction

kasmot has asked for the wisdom of the Perl Monks concerning the following question:

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Re: date subtraction by borisz (Canon) on Jul 05, 2004 at 08:35 UTC
Use a module like Date::Calc and the `Delta_Days` method. Or Date::Manip. Or use `HTTP::Date` to translate the date to seconds subtract them and divide by seconds of a day. `use HTTP::Date; print ( str2time($date1) - str2time($date2) ) / 3600;` [download] Boris	[reply] [d/l] [select]
Re: date subtraction by edan (Curate) on Jul 05, 2004 at 08:38 UTC
The most commonly recommended Date/Time modules are: Date::Manip - the heavy-weight choice. Date::Calc - a bit more lightweight, but still feature-rich. -- edan	[reply]
Re: date subtraction by neeraj (Scribe) on Jul 05, 2004 at 08:54 UTC
Use Date::Calc module `use Date::Calc qw(Delta_Days); $days = Delta_Days( $year1, $month1, $day1, $year2, $month2, $day2);` [download] or if you have the time also use this form:- `use Date::Calc qw(Delta_DHMS); ($days, $hours, $minutes, $seconds) = Delta_DHMS( $year1, $month1, $day1, $hour1, $minute1, $seconds1, # +earlier $year2, $month2, $day2, $hour2, $minute2, $seconds2); # +later` [download]	[reply] [d/l] [select]
Re: date subtraction by Happy-the-monk (Canon) on Jul 05, 2004 at 08:28 UTC
There is. Have a look at the `Date` and `Time` modules on `CPAN`. I could have told you more, had you given me an example. Update: ~~You find general examples in the Tutorials section of this site.~~ Pity me, no, there aren't any tutorials on the `Date` and `Time` modules (yet). Hint, hint... Cheers, Sören	[reply]
Re: date subtraction by tomhukins (Curate) on Jul 05, 2004 at 17:10 UTC
Perl's DateTime project aims to produce a comprehensive suite of modules for dealing with dates and times. Historically, such modules in Perl often perform well at certain tasks, but badly at others. DateTime overloads the addition and subtraction operators, so you can find the difference between two dates with `$duration = $end - $start`, where `$end` and `$start` are DateTime objects and `$duration` is a DateTime::Duration object.	[reply] [d/l] [select]