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  1. use strict;
  2. use warnings;
  3. use feature qw(say);
  4.  
  5. use Time::Piece;
  6. use Time::Seconds;
  7.  
  8. say " Today is " . localtime;
  9. say "Yesterday is " . localtime - ONE_DAY;
  10.  
Success #stdin #stdout 0.03s 4928KB
stdin
Standard input is empty
stdout
    Today is Wed Sep 17 02:44:12 2014
Yesterday is Wed Dec 31 00:00:00 1969