Yet Another CPAN Grep

DR-DateTime ( U/UN/UNERA/DR-DateTime-1.00.tar.gz, UNERA, 2017; MetaCPAN )

DR-DateTime/lib/DR/DateTime.pm ( view source; MetaCPAN )

 POSIX ();
use Time::Local ();
use Time::Zone ();
use feature 'state';

sub TO_JSON { shift->strftime('%F %T%z') }  # JSON::XS compatible

use overload
        'bool'      => sub { 1 },
        '""'