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there is sometimes a need to deal with times at the sub-second
level.  Time::HiRes works in seconds and milliseconds.
It is particularly useful in timing sections of code.

=head1 OBJECT-ORIENTED SOLUTIONS

An alternative to the functional solutions described above is an
object-oriented solution that involves creating and manipulating
true "datetime" objects.

=head2 DateTime

 http://datetime.perl.org/
 http://datetime.perl.org/modules.html
 http://search.cpan.org/~drolsky/DateTime/
 http://search.cpan.org/~drolsky/DateTime/lib/DateTime.pm

The latest significant entrant (and quite promising) in the perl
date/time area is Datetime.pm.  It attempts to be the definitive
date/time module for perl, building on the work of Time::Piece
and Class::Date. 

Furthermore, the DateTime module is not alone.  Rather, it is
part of a project where many date/time developers collaborate
for an entire framework of date/time modules.

 * OO interface
 * Parsing of dates provided by DateTime::Format::* modules
 * Flexible formatting using POSIX strftime() format specifiers.
   (formatting done automatically during object stringification)
 * Limited internationalization support.
 * Good date math support.
 * Unknown support for dates outside [1970-2038]
 * Moderate support on Win32 platform.

=head2 Time::Piece [Time::Object, Time::Seconds]

 http://search.cpan.org/search?module=Time::Object