/usr/share/perl5/ is in libhtml-calendarmonth-perl 1.26-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/perl5/HTML/
/usr/share/perl5/HTML/CalendarMonth.pm
/usr/share/perl5/HTML/bs.pm
/usr/share/perl5/HTML/CalendarMonth/
/usr/share/perl5/HTML/CalendarMonth/DateTool/
/usr/share/perl5/HTML/CalendarMonth/DateTool/DateCalc.pm
/usr/share/perl5/HTML/CalendarMonth/DateTool/Cal.pm
/usr/share/perl5/HTML/CalendarMonth/DateTool/TimeLocal.pm
/usr/share/perl5/HTML/CalendarMonth/DateTool/DateManip.pm
/usr/share/perl5/HTML/CalendarMonth/DateTool/Ncal.pm
/usr/share/perl5/HTML/CalendarMonth/DateTool/DateTime.pm
/usr/share/perl5/HTML/CalendarMonth/DateTool.pm
/usr/share/perl5/HTML/CalendarMonth/Locale.pm