jwilk-archive/perl-friday

Perl code that is syntactically correct only on Fridays

$ date -R
Fri, 29 Nov 2019 23:52:02 +0100

$ perl -c friday.pm
friday.pm syntax OK

⋮

$ date -R
Sat, 30 Nov 2019 00:03:06 +0100

$ perl -c friday.pm
syntax error at friday.pm line 12, at EOF
friday.pm had compilation errors.