01-19-2011
Well, YYYY-MM-DD HH:MM:SS date-time compares right as strings, so generally the quickest way to compare is to shuffle the bytes around to that format.
To generate the date 3 months ago in that format, you need date arithmetic, usually the realm of C/C++/JAVA/PERL/etc., with leap year knowledge for month lengths and such. Some of the later shells, like ksh93 and certainly bash, have date arithmetic. Is this 3 months = 90 days or varying?
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LEARN ABOUT DEBIAN
email::date::format
Email::Date::Format(3pm) User Contributed Perl Documentation Email::Date::Format(3pm)
NAME
Email::Date::Format - produce RFC 2822 date strings
SYNOPSIS
use Email::Date::Format qw(email_date);
my $header = email_date($date->epoch);
Email::Simple->create(
header => [
Date => $header,
],
body => '...',
);
DESCRIPTION
This module provides a simple means for generating an RFC 2822 compliant datetime string. (In case you care, they're not RFC 822 dates,
because they use a four digit year, which is not allowed in RFC 822.)
FUNCTIONS
email_date
my $date = email_date; # now
my $date = email_date( time - 60*60 ); # one hour ago
"email_date" accepts an epoch value, such as the one returned by "time". It returns a string representing the date and time of the
input, as specified in RFC 2822. If no input value is provided, the current value of "time" is used.
"format_date" is exported only if requested.
email_gmdate
my $date = email_gmdate;
"email_gmdate" is identical to "email_date", but it will return a string indicating the time in Greenwich Mean Time, rather than local
time.
"format_gmdate" is exported only if requested.
PERL EMAIL PROJECT
This module is maintained by the Perl Email Project
<http://emailproject.perl.org/wiki/Email::Date::Format>
AUTHOR
Ricardo SIGNES, <rjbs@cpan.org>.
Adapted from Email::Date, by Casey West.
COPYRIGHT
Copyright (c) 2007, Ricarod SIGNES. This module is free software; you can redistribute it and/or modify it under the same terms as Perl
itself.
perl v5.8.8 2007-12-13 Email::Date::Format(3pm)