/usr/lib/x86_64-linux-gnu/ is in libdatetime-perl 2:1.21-1build1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/x86_64-linux-gnu/perl5/
/usr/lib/x86_64-linux-gnu/perl5/5.22/
/usr/lib/x86_64-linux-gnu/perl5/5.22/auto/
/usr/lib/x86_64-linux-gnu/perl5/5.22/auto/DateTime/
/usr/lib/x86_64-linux-gnu/perl5/5.22/auto/DateTime/DateTime.bs
/usr/lib/x86_64-linux-gnu/perl5/5.22/auto/DateTime/DateTime.so
/usr/lib/x86_64-linux-gnu/perl5/5.22/DateTime.pm
/usr/lib/x86_64-linux-gnu/perl5/5.22/DateTime/
/usr/lib/x86_64-linux-gnu/perl5/5.22/DateTime/Helpers.pm
/usr/lib/x86_64-linux-gnu/perl5/5.22/DateTime/Infinite.pm
/usr/lib/x86_64-linux-gnu/perl5/5.22/DateTime/LeapSecond.pm
/usr/lib/x86_64-linux-gnu/perl5/5.22/DateTime/Duration.pm
/usr/lib/x86_64-linux-gnu/perl5/5.22/DateTime/PP.pm
/usr/lib/x86_64-linux-gnu/perl5/5.22/DateTime/PPExtra.pm