Calculating time diff between two date times in Perl

A short script for calculating difference between two date times in Perl.

See source code on GitHub: https://github.com/64board/Perl/blob/main/time_diff_time_piece.pl

The Perl Time::Piece module: https://perldoc.perl.org/Time::Piece

The excellent Calendar FAQ at http://www.tondering.dk/claus/calendar.html